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1[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/the100.jpg]]
2[[caption-width-right:350:''"This is Earth, Clarke. Anything's possible."'']]
3->"''Who we are and who we need to be to survive are two very different things.''"
4-->-- '''Bellamy Blake'''
5
6''The 100'' is an American ScienceFiction series airing on Creator/TheCW. It is very loosely based on Kass Morgan's novel series of the same name.
7
8The series begins in 2149, 97 years after a nuclear apocalypse devastated Earth. The only survivors were thought to be the inhabitants of twelve national space stations that were in orbit at the time, which have since joined into a single large station called the Ark. On this ship, laws are harsh and resources are dwindling -- so the Ark's leaders turn to Earth as a potential solution.
9
10One hundred juvenile delinquents are sent down to Earth in a dropship to see if it is fit for habitation again. Cut off from the Ark due to a landing mishap, the delinquents try to set up camp on the ground. But while the group's eventual leaders -- Clarke Griffin (Creator/ElizaTaylor), a privileged young woman who was kept in solitary lockup because of the secret her father was killed for knowing, and Bellamy Blake (Creator/BobMorley), a rebellious former guard demoted after the Ark learned about his illegal younger sister Octavia (Creator/MarieAvgeropoulos) -- find that establishing a functional society comprised of teenagers on an unfamiliar planet is hard enough by itself, there's one other major complication: they aren't the only humans on Earth. The camp quickly comes into conflict with the Grounders, clans of people who also survived the apocalypse, and who aren't happy about the 100 crashlanding onto their territory.
11
12On the Ark, its leadership scrabbles to maintain order. Clarke's mother Abigail (Creator/PaigeTurco) alternately clashes and cooperates with fellow councilor Marcus Kane (Creator/HenryIanCusick) and the Ark's leader, Chancellor Thelonius Jaha (Creator/IsaiahWashington), as they try to stay on top of the Ark's ever-growing list of problems.
13
14The series premiered in the United States on March 19, 2014 and all seven seasons of the show can currently be streamed on Creator/{{Netflix}}. It finished its run on September 30, 2020, after seven seasons and (aptly enough) 100 episodes.
15
16There is also a [[Characters/{{The 100}} character page]] and a [[Recap/{{The 100}} recap page]]. Feel free to contribute.
17
18In October 2019, it was reported that The CW was developing a prequel spin-off set 97 years before the start of the series. The cast was announced in February 2020, with the [[PoorlyDisguisedPilot backdoor pilot]] being aired as part of ''The 100'''s final season on July 8, 2020. [[https://deadline.com/2021/11/the-100-prequel-dead-not-moving-forward-the-cw-1234869233/ On November 5, 2021]], it was confirmed that the spin-off was not moving forward.
19----
20!!Tropes present in this series:
21[[foldercontrol]]
22
23[[folder:A-F]]
24* AbortedArc: Many of them. In Season 1, Octavia kisses several characters without any development later. In Season 2, there were mutated humans who scared Octavia but were never seen again.
25* ABNegative: Invoked twice in one incident. Nyko has Rh-null blood, one of the rarest blood types in the world. This proves a problem when they can't find a match for him when he's dying of a wound. Octavia, not understanding the issue, asks Abby what the big deal is, seeing as all Arkers are universal donors.
26* AccidentalMurder:
27** When their radios do not work, the 100 launch flares in the hopes that the Ark will see them and realize that they are alive. Unfortunately the flares land in a Grounder village and burn it down, which the Grounders take as an act of war.
28** In "Thirteen", Titus [[spoiler:planned to kill Clarke and frame Murphy]] for the act, but wound up [[spoiler:shooting Lexa]] instead.
29* ActionGirl:
30** The Grounders do not appear to have any assigned gender roles, and women are trained as warriors and leaders alongside the men.
31** Indra is the commander of the Woods Clan, who is hostile to the Ark but becomes a valued ally as they work together.
32** Octavia is mentored by Indra in the second season, [[CharacterDevelopment learning Grounder ways and how to fight]]. She becomes a capable warrior as a result of this, going on to out-think and kill [[spoiler:Luna]].
33** Lexa is the Grounder Commander, who heads the Twelve Clans.
34** Clarke who had a major fight with Anya in Season 2 and won. In Season 3, she killed a panther with just a knife.
35** Anya is the first Grounder leader encountered by the 100, she is a leader of the Woods Clan and is the first recurring antagonist of the series.
36** Major Byrne was a member of the Guard on the Ark, and becomes one of the combat/security leaders after the Ark returns to Earth. When the Ark begins to form an alliance with the Grounders, she is involved as a military advisor and Clarke's bodyguard. However, she's no match for a mutated gorilla.
37** Raven who mostly fixes and makes the weapons and is capable of using them.
38** Abby is capable with firearms and acts as a leader. She is also a doctor and because of this she hesitates to take lives, unless it is necessary.
39* ActionPolitician: Both Clarke and Lexa act as leaders of their people and are pretty much always on the front-lines where the action is.
40* ActionSurvivor: None of the 100 know anything about Earth and very few know anything about combat. Those who survive do so by slowly learning how to fight.
41* ActuallyThatsMyAssistant: When Kane tries make contact with the Grounder Commander in order to negotiate peace between them and the Ark survivors, the large warrior Gustus locks him in a cage with Jaha and a Grounder slave woman. Jaha and Kane debate over how they can convince Gustus that their desire for peace is genuine, unaware that the slave woman in the cell with them is actually Lexa, the true Grounder Commander, who was scoping them out to see if they really did want peace. Gustus was actually her trusted lieutenant.
42* AdaptationExpansion: The books focus on little else besides the 100; the show does more worldbuilding by lending focus to the adults on the Ark and the Mountain Men, and goes deeper into Grounder culture.
43* AdaptationNameChange:
44** From "The Colony" in the books to "The Ark" on the show.
45** People who survived the nuclear winter are called "Earthborn" in the books while the show calls them "Grounders."
46* AdaptationalRomanceDowngrade: Note that the show is an InNameOnly adaptation of the books.
47** In the books, Wells and Clarke were in a relationship prior to his betrayal of her parents; in the show Wells clearly likes her but is offed before anything can come of it.
48** In the books, Bellamy and Clarke get together fairly quickly and are an OfficialCouple. In the show, they are JustFriends and PlatonicLifePartners with the occasional ShipTease that goes nowhere. Instead, both are paired with multiple different characters throughout the show, and by the end, Clarke [[spoiler:kills Bellamy]].
49* AdaptedOut: Glass and her storyline are not present in the series, which focuses on Wells, Clarke, Bellamy (the other 3 [=POV=]s) and the rest of the 100. Conversely, a bunch of {{Canon Foreigner}}s were created. Other characters to be cut from the novels include Thalia, Luke, Lilly, Asher, and Graham.
50* AdvancingWallOfDoom: The main threat of Season 4, [[spoiler:the Praimfaya wave. The nuclear reactors in Europe are finally breaking down, releasing huge amounts of radiation, which are estimated to reach the main setting in mere months. Everyone scrambles to find some way to survive it, as this is a force that simply cannot be beaten.]] The main solution turns out to be [[spoiler:avoiding it by going down to an underground bunker and wait for five years]], while another group, cut off from the others, manages to [[spoiler:go over it by heading up to the remains of the Ark.]]
51* AerithAndBob: It ''is'' the future.
52** The Sky people; common names like Jasper, Monty, and Nathan exist alongside presently used but fairly uncommon names like Bellamy, Thelonius, and Sterling, as well as downright weird ones like Atom.
53** The Grounders lean towards the more fantastical end of the naming scale. They have common given names like Anya, Tristan, and Luna, [[MyNaymeIs odd variants of common names]] like Lexa, Gustus, and Nyko, words that are not commonly used as first names like Lincoln, Echo, and Roan, and weird ones like Emori, Denae, and Semet.
54* AfterTheEnd:
55** Ninety-seven years after a nuclear war that spanned the globe. The Ark is a conglomeration of twelve space stations that were in orbit around Earth at the time, and to the knowledge of its inhabitants they were the only survivors. However, there are large populations of humans still on the planet which have developed their own societies after the destruction.
56** [[spoiler:Happens again after the Praimfaya wave devastates most of the planet and kills most of the remaining life. Clarke and Madi wander this environment for six years. Only a single valley is left untouched, and ''that'' gets destroyed when [=McCreary=] activates Damocles.]]
57* AlienBlood: Some of the Grounders have pitch black blood, after which they are called ''Nightbloods''. It marks them as being eligible to become the next Commander. It's later revealed that black blood was engineered in pre-apocalypse times to let someone withstand high levels of radiation.
58* AllCrimesAreEqual: On The Ark, all crimes are punishable by death unless you are under eighteen years of age. Juveniles are held in solitary confinement until their eighteenth birthday, whereupon a trial is held to determine if they should be executed or allowed to re-enter Ark society. This is for population control purposes, as there is limited life support on The Ark.
59* AlliterativeName: A recurring theme with Callie Cartwig, Bellamy Blake, Jasper Jordan and Raven Reyes.
60* AlmostDeadGuy: Gina has been stabbed by a Grounder who activates a self-destruct in Mount Weather, but manages to tell Raven to get the deactivation code so that she can turn off the self-destruct. [[spoiler:[[SubvertedTrope Though Raven does get the code, Gina has bled out in the intervening seconds and died before she could deactivate the self-destruct]].]]
61* AlwaysChaoticEvil:
62** Though the Grounders are revealed to be more complicated than as first appears, both they and the 100 regard the Reapers as unreachable murderous monsters. The Reapers are ultimately revealed to be Grounders harvested by the Mountain Men, turned feral by way of a FantasticDrug.
63** The show generally deconstructs and subverts this trope as even the Mountain Men are shown to be complicated and have reasons for their "evil" actions and the Grounders, Sky People, and Mountain Men all have shades of grey and the desire to do what is best for their people.
64* AnarchyIsChaos: The 100 are a ''mess'' after Bellamy takes the reins and declares that [[TeenageWasteland they can do "whatever [they] want, whenever [they] want]]." It takes Wells' and Charlotte's deaths and Murphy's exile to make them realize they need laws.
65* AndStarring: "With Isaiah Washington And Creator/HenryIanCusick"
66* AnyoneCanDie: The series has killed off several supporting/minor characters and so far at least one main character per season and also isn't shy about high body counts even including children. The notable deaths per season are:
67** Season 1: Wells, Charlotte, Atom, Myles, Diana Sydney, and Shumway.
68** Season 2: Anya, Finn, Sterling, Fox, Maya, Dante, Cage, and Tsing.
69** Season 3: [[spoiler:Lexa, Lincoln, Monroe, Sinclair, Pike, Hannah, Titus, Nia, Ontari, Gina, and Shay.]]
70** Season 4: [[spoiler:Nyko, Ilian, Roan, Luna, Riley, Jasper, David Miller. Not to mention the millions who die in Praimfaya.]]
71** Season 5: [[spoiler:Jaha, Kara, Ethan Hardy, Vinson, [=McCreary=], Monty and Harper.]]
72** Season 6: [[spoiler:Shaw, Delilah, Kaylee, Kane, Jade, Josephine, Ryker, Priya, Abby, and Simone.]]
73** Season 7: [[spoiler:Bellamy, Gabriel, Diyoza, Anders, Sheidheda, Cadogan, Russell, Nelson, Hatch, Orlando and Doucette.]]
74* ApocalypseHow: Caused by a nuclear armageddon. The effect was "Planetary/Societal Collapse" for Earth and "Societal Disruption" for the Ark.
75* ArcNumber:
76** [[TitleByNumber 100]]. It's the number of delinquents originally planned to be sent down to earth, the number of slots left [[spoiler:in Arkadia in Season 4, and the number of representatives each clan gets to send to the bunker.]]
77** 12 and 13:
78*** The Ark was formed by 12 nations, each corresponding one of its 12 stations. [[spoiler: It originaly had 13 stations, but Polaris, the 13th station, was destroyed.]]
79*** The Grounders have 12 clans. [[spoiler: Skaikru becomes the 13th.]]
80*** There are 12 Primes. Gabriel, the 13th Prime, defected against them after his "moral awakening".
81* TheArk: The last bastion for the survivors of the nuclear winter. At least that's what they thought.
82* ArtifactTitle:
83** In the first season, the realpolitik of the Ark and the struggles of its higher-ups was a secondary storyline to that of the titular 100 (technically 102, including Bellamy and Raven) surviving on Earth. The third season focuses more on exclusively on politics, worldbuilding, and war engineered by the Ark and Grounder leaders, with the surviving members of the 102 (except for Clarke, Bellamy, Octavia, Raven, Jasper, and Monty) getting put OutOfFocus.
84** It becomes somewhat relevant again in Season 4, with [[spoiler:Arkadia only having enough space for 100 survivors. However, it becomes a moot point when Arkadia is blown up.]] Several episodes later, [[spoiler:Octavia declares that each clan will get 100 spots in the bunker. In order to decide who gets to live Jaha and Kane use Clarke's list that she made earlier in the season for the potential Arkadia survivors.]]
85* ArtificialIntelligence: It's eventually revealed that the nuclear apocalypse was caused, not by nations going to war, but by a [[AIIsACrapshoot rogue A.I.]] called A.L.I.E. hacking the world's nuclear weapons systems, in an effort to curb overpopulation. She becomes the BigBad of Season 3, where she continues her misguided efforts to help humanity by turning all surviving humans [[AssimilationPlot into computer based consciousnesses as well]], whose [[LaserGuidedAmnesia memories]] and [[EmotionControl emotions]] can be edited to [[GettingSmiliesPaintedOnYourSoul create perfect happiness]], [[TheEvilsOfFreeWill free will be damned]].
86** The Commanders of the Grounders and the Primes of Sanctum are also revealed to be artificial intelligence's, albeit created by BrainUploading human minds onto computer drives.
87* ArtisticLicenseBiology: The Mountain Men.
88** They are unable to metabolize the radiation outside their mountain home. They break out in instantaneous lesions and bleeding wounds when exposed to radiation, which are treated with blood transfusions from Grounders or members of the Ark. The blood transfusions not only prevent further damage, but heal what has already occurred. They then move on to bone marrow transplants from Ark members to cure their radiation weakness.
89** Their bone marrow plot seems to be "take someone's bone marrow and stick it into anyone else." This is hardly the case in real life. Donor and recipient have to be matched, and with only 40-something donors for 400ish recipients, you'd be lucky to find even one match for people who are not directly related.
90*** Possible [[JustifiedTrope justified]], with a mention that Skaikru were all genetically engineered to be universal donors.
91* ArtisticLicenseEngineering:
92** In the second season, Jaha descends to the ground using a nuclear missile. We can assume that it wasn't specifically converted into a shuttle because the warhead is still inside, yet it has a braking parachute and enough internal room for Jaha to climb aboard.
93** The entire concept of the Praimfaya death wave in Season 4 is pure fantasy. [[spoiler:For starters, no nuclear powerplant in existence would last close to 100 years without any oversight or maintenance. In RealLife you could consider yourself lucky if they lasted 100 ''days'' before melting down. Furthermore, no meltdown, not even a simultaneous, collective one across an entire continent, would create a scorching plasma wave with enough thermal energy to cover the entire planet and incinerate human bodies before it even touches them. It ''would'' dangerously increase global radiation levels across the globe, leading to a surge of cancer patients, birth defects and similar radiation-induced illnesses in the surviving population, but it sure as hell wouldn't wipe out all organic life on Earth in one swoop.]]
94* AscendedToAHigherPlaneOfExistence:
95** The entire City of Light plotline has shades of this in its recruiting pitch.
96** [[spoiler:The show ends with what's left of the human race transcending the physical universe on behalf of SufficientlyAdvancedAliens, leaving behind their bodies and turning into immortal [[EnergyBeing Energy Beings]]. That said, transcendence is voluntary, and [[TrueCompanions the surviving core characters]] [[IChooseToStay choose to stay mortal]] and live out the rest of their lives in peace, together.]]
97* AssInAmbassador: In Season 3, the Ice Nation has become belligerent and intends to break the Grounder Coalition. Their ambassadors are condescending and hostile to the other Grounder tribes and the Sky People. One of them gets himself thrown off a balcony for his arrogance, but that has no tempering effect on the others.
98* AssimilationPlot: A.L.I.E., an ArtificialIntelligence, attempts to force all human beings to ingest a computer chip that will connect them to the City of Light: a {{Cyberspace}} reality where they will [[BrainUploading continue to exist as computer programs even after their physical bodies are killed]], and where A.L.I.E. can use EmotionControl and LaserGuidedAmnesia to make them [[GettingSmiliesPaintedOnYourSoul perfectly happy, whether they want to be or not.]]
99* AsskickingLeadsToLeadership:
100** Though the Grounders believe that their Commanders are chosen through BornAgainImmortality and are selected by the spirits of previous Commanders, they need to prove that they are worthy of ''retaining'' that power after they are in the position. Gustus, Lexa's bodyguard, fears that if she shows any weakness she will be deposed and killed by her own people.
101*** To prove that the Spirit of the Commander has chosen you to become the next Commander in the first place, you have to win a [[DeadlyGraduation Conclave]] in which you have to fight and kill the other potential successors.
102** This becomes a major plot point at the end of Season 4 [[spoiler:with regards about what to do with a bunker that can support 1200 people now that the approaching Praimfaya wave is unavoidable and it is the only hope for humanity's survival. In order to avoid a full-on war between every clan, Roan proposes that a Conclave should be held with a single Champion selected from each clan and that the winner will be allowed to utilize the bunker however they see fit. Octavia ends up winning the Conclave and, after declaring that all clans will be allowed to live in it together, is pronounced the leader of Wonkru.]]
103* AwesomenessByAnalysis: Josephine is able to identify [[ConLang Trigedasleng]] as an English Creole and start picking up the gist of what people are saying after only hearing a few sentences.
104* BackForTheFinale: The "judge" appearing as [[spoiler:Lexa]] (for Clarke) and [[spoiler:Abby]] (for Raven) in the [[GrandFinale series finale]].
105* BackFromTheDead: In the third season, when a person with the A.L.I.E chip or the Flame/A.L.I.E 2.0 chip dies, their minds are uploaded into a main frame and are technically still alive in a virtual world and they become part of the artificial intelligence. This makes it so that [[spoiler:Lexa]] is able to appear in the finale after her death in the real world to help [[spoiler:Clarke]] in the City of Light. Otherwise, it's a setting with AllDeathsFinal.
106* BadassBoast:
107** Raven is very self-confident when it comes to her engineering skills. When Bellamy points out that the bridge she intends to destroy has survived nuclear war and one hundred years of weather, she is undaunted.
108--->'''Raven''': It won't survive ''me''.
109** In the second season, despite the resumption of political rule by the Ark survivors, Clarke retains her power from her influence with the Grounders.
110--->'''Clarke''': You may be the chancellor, but I'm in charge.
111** In the third season, when Lexa is prodded as to who she will select to be her champion in her trial of combat:
112--->'''Lexa''': I am the Commander. ''No one'' fights for me.
113* BeardOfSorrow: Jasper starts Season 3 in a depressed funk with a goatee. This is in stark contrast with the preceding seasons, in which his clean-shaven face emphasized his innocence.
114* BeautifulDreamer: When Lexa has fallen asleep on her couch in the opening of "Bitter Harvest", Clarke sits across from her and sketches a portrait of her sleeping.
115* BeneathNotice: At the start of Season 3, Clarke is hiding in the wilderness and avoiding both Arkadia and the Grounder Coalition. Since she is living as a normal Grounder, speaking Trigedasleng and hunting for her own food, occasionally exchanging animal meat and skin for goods at a trading post, nobody thinks that she might be the person everybody is looking for. [[spoiler:[[SubvertedTrope Roan sees through the disguise and captures her regardless.]]]]
116* BetterTheDevilYouKnow: Chancellor Jaha is perfectly willing to accept the Ark's code of laws which require the execution of all criminals over age eighteen, even those who have committed minor crimes. That said, Abigail, whose husband was executed under Jaha's administration because [[HeKnowsTooMuch he knew too much]], says she prefers having Jaha in power over Kane and even risks being executed herself to keep him alive.
117* BigBrotherInstinct: Bellamy and Octavia's relationship in spades. Bellamy's one redeeming character trait before CharacterDevelopment is his care and protection towards Octavia (and even then, he was ''over''protective). His protection of Charlotte is also suggested to be due to his big brother instinct.
118* BilingualBonus: The name "Wonkru," meaning "one people," sounds like [[spoiler: "wankru," which would mean "people of death," hinting at what happened in the bunker]].
119* BiologicalWeaponsSolveEverything: The Grounders send Murphy back to the 100 after infecting him with a virus that will render his people feverish and weak by the time the Grounders invade two days later. It doesn't quite work, but only through quick thinking on the 100's part.
120* BittersweetEnding:
121** The Season 2 finale is more a DownerEnding, see below. But it is also bittersweet since Clarke and Bellamy do accomplish the goal of saving their people from Mount Weather, and the prisoners get to reunite with their loved ones.
122** The Season 3 finale. [[spoiler: The City of Light is destroyed and people reunite with their loved ones, but Clarke has to finally say goodbye to Lexa, and A.L.I.E. reveals to her that radiation from nuclear plant meltdowns is going destroy the earth again in about six months.]]
123** Season 5 [[spoiler: concludes with the Earth destroyed once again. The survivors go into cryosleep for what is supposed to be 10 years to wait for it to recover, but when Bellamy and Clarke are awakened, they discover it was actually 125 years and that Monty and Harper stayed awake to live together in peace and had a son. In a heartwrenching video log, Bellamy and Clarke learn that Monty spent his entire life searching for a new home for humanity and sent them to a faraway planet, where he hopes that they will do better than they did on Earth. The season ends with Bellamy and Clarke in tears, holding each other and gazing at their new planet, sad for the loss of their friends but hopeful for their future.]]
124** Season 7 [[spoiler: and the series ends with Sheidheda and Cadogan dead, and the Judge ascending humanity after Indra and Octavia convince both sides to stop fighting. However, Clarke is barred from ascending as she killed Cadogan during the test, leaving her the last human left in existence... or so it seems. In an interesting turnaround, however, Clarke's friends (Raven, Octavia, Gaia, Indra, Jordan, Echo, Hope, Murphy, Emori, Jackson, Nathan, Niylah, and even Levitt) all rejected transcendence in order to be with her again despite knowing that they won't be allowed to create children to continue the species and they won't be able to transcend with the rest of humanity after they die. With no one else to fight, their fight is finally over.]]
125* BlackAndGrayMorality: To the point that "there are no good guys" becomes a frequent phrase used by the main characters.
126** The Ark enforced draconian laws [[AllCrimesAreEqual which execute offenders for even minor offenses]], but it is made clear that this is viewed as a necessity to preserve resources as long as possible.
127** The 100 commit numerous acts of war against the Grounders, initially through ignorance, but later decide that the best way to deal with the situation is with increased violence, particularly by killing off Grounders by the hundreds using bombs and rocket fuel. They are just trying to survive, though.
128** The Grounders have a warrior culture that is quick to bloodshed and endorses grueling torture as execution, even from characters that are portrayed as especially "good" or honorable. This is portrayed as just the way they have learned to survive after a literal Apocalypse.
129** The Mountain Men engage in sadistic medical experiments upon the innocent and will not even discuss potential alternatives, not hesitating even when a peaceful solution is literally shouted into their faces. This also doubles as GrayAndGrayMorality because the atrocities are carried out because they are genuinely the only way for them to survive -- the Mountain Men have no tolerance for the surface radiation on the earth, and the only treatment is derived from the blood of kidnapped grounders. Later, they find that the people of the Ark can potentially cure them completely, but only with their bone marrow -- leading them to attempt to kill dozens of teenagers in an attempt to protect themselves from radiation.
130** Played straight with the conflict with Nia the Ice Nation Queen because her actions were just so she can gain more power by her hunting for Clarke because she believed that if she kills her she will gain power from all the people she has killed and her organizing the bombing of Mount Weather that kills several innocent people just so she can make a play for Lexa's throne. Also with Ontari who also seeks power and even murdered [[spoiler:children]] in their sleep to get it.
131** Pike and the people of Farm Station adopt an excessively aggressive stance toward the Grounders because they landed in the midst of Azgeda, a particularly brutal Grounder clan, and have experienced nothing but atrocities at the hands of Grounders. However, this leads to Pike and the rest of the Ark people committing a number of unprovoked atrocities against their own Grounder allies.
132** Clarke herself walks headlong into this trope several times. First, when she [[spoiler:slaughters the entirety of Mount Weather -- including allies and children -- to save her people from being harvested for their bone marrow]]. Then, when she [[spoiler:forcibly harvests bone marrow from Luna and nearly tests it on Emori against her will in a last-ditch effort to save everybody from radiation,]] and again when she [[spoiler:locks all of the Grounders and some of her own people out of the Second Dawn bunker as Praimfaya is approaching because she genuinely believes it is the only way to ensure the survival of the human race]].
133* BloodFromEveryOrifice: The virus the Grounders send the 100 has people bleeding from the eyes, mouth, and nose.
134* BloodyHorror: After discovering Clarke's plan to kill her, Nia has Ontari cut her own hand and cover Clarke's face with her blood. Clarke is still covered in her blood in the following scene, shocked by the event and by the ''color'' of the blood as well, as Ontari is a black-blooded "Nightblood".
135* BlueAndOrangeMorality: In Season 3, we are introduced to A.L.I.E., an [[ArtificialIntelligence artificial intelligence]] whom Jaha is helping to shepherd the citizens of Arkadia to the "City of Light," a rumored promised land. To enter, a person must swallow a device that hardwires the brain into feeling absolutely no pain, physical or otherwise, wiping entire sections of memory and essentially turning people into drones for her. As an artificial intelligence, she has no human emotions or human understanding of right and wrong and is just following her core command, which is to "make life better for humanity." She takes drastic measures to accomplish this, including wiping out most of mankind before the events of the series to prevent a potential overpopulation problem. It is later revealed that her purpose for the City of Light was to [[spoiler:"save humanity" from a coming nuclear deathwave that will irradiate the ground in six months' time. Taking away pain was an attempt to give people happy lives, and after the end came, their minds would have lived on in the city,]] but as a machine, she couldn't understand what exactly was wrong with the violent ways she went about getting people to enter.
136* BodyCountCompetition: Grounders keep track of their kills through scars/tattoos on their body, often bragging about them. Niylah observes in surprise that Clarke does not have any tally marks on her back, but Clarke responds that there is not enough room.
137* BodySnatcher: The Primes of Sanctum are actually the centuries-old consciousnesses of the original colonists, stored on computer drives and [[BodySurf inserted into new bodies as their old ones die]]. This process erases the mind of the body's original owner and allows the Prime to take control. [[spoiler:Happens to Clarke, when she's made a host for Josephine Prime.]]
138* BookEnds:
139** Clarke starts and ends the first season alone, locked in an empty room with a painting of the night sky.
140** The above poster from Season 1 contains the eponymous 100 juveniles falling from the sky. [[http://www.impawards.com/tv/hundred_ver13.html For the last season, its poster has what's left of the 100 levitating towards the sky.]]
141* BornAgainImmortality: The Grounders believe this is what happens to the Commander: when they die, their spirit chooses the next Commander, who emerges as the winner of the [[DeadlyGraduation Conclave]]. "Thirteen" reveals that [[spoiler:the Commander's spirit is really the A.L.I.E. 2.0 chip, also called the Flame, which is implanted in each Commander's brainstem and passed on from one Commander to the next.]]
142* BothSidesHaveAPoint: This is the basis for the conflict between the Grounders and the Sky People, as both sides have good reasons to distrust and dislike the other and both sides are guilty of committing terrible acts against the other, both intentionally and unintentionally.
143* BoundAndGagged: Happens to almost every major character at least once, especially in Season 3.
144* BoxedCrook: All 100 of the juveniles sent to Earth. If they succeed in their mission to Earth (read: survive, thus proving the habitability of the planet), then they will be pardoned for their crimes.
145* BrainwashedAndCrazy:
146** The Reapers, who are Grounders forcibly given a drug to turn them feral.
147** People chipped by A.L.I.E. harm themselves and others to coerce more people to join the City of Light.
148* ButWhatAboutTheAstronauts: The entire surviving human population is descended from the astronauts who were living on space stations at the time of the nuclear war...or so they thought. Turns out Earth is a bit more populated.
149* CanonForeigner: The rest of the 100 that aren't Wells, Clarke, Octavia, and Bellamy were not identified by name in the book, let alone given personalities.
150* TheChainsOfCommanding:
151** A running theme of the series is that the job of "leader" is not an easy one: Sometimes you have to do things that go against everything you stand for in order to protect your people. Jaha had to execute people on The Ark just to ensure PopulationControl and conserve dwindling resources, which clearly took a toll on him. Kane, a WellIntentionedExtremist, had to deal with the guilt of knowing that the people he had killed didn't need to die. Clarke, TheMedic and an AllLovingHero, could not handle the strain of being forced to kill in defense of The 100 and left Camp Jaha for parts unknown because of it.
152** In Season 3, the concept gets an explicit discussion between Clarke and Lexa when they both wonder if, someday, they might not be able to lead their own individual lives without needing to worry about the needs of their people as well.
153* ChallengingTheChief: There is a [[PlayingWithATrope variation]] in Season 3. Queen Nia of the Ice Nation challenges Lexa's position as the Grounder Commander and selects her son to fight Lexa in a TrialByCombat. However, neither Nia nor Roan can become the new Commander if Lexa is defeated: the title will instead descend onto one of the [[RoyalBlood Nightbloods]]. Nia hopes that Ontari, an Ice Nation Nightblood, will become the new Commander.
154* TheChampion: [[DeconstructedTrope Deconstructing]] the concept of the Champion is a recurring theme throughout the series, as Champions often perform morally ambiguous or directly-amoral actions for the protection of the one being championed. In each instance, the one being championed resents having the responsibility being placed on them for the actions of the Champion, or opposes the Champion's actions directly. Every Championed pair either learns to leave that dynamic behind, or is destroyed by it.
155** Best example is Bellamy as Octavia's Champion. This trope embodies their relationship (at least, at first) to the point that his refrain throughout much of the series is "my sister, my responsibility." Since he was six years old and she was placed into his arms moments after she was born, Bellamy's goal has been to protect Octavia at all costs. To wit, Bellamy shoots Jaha to get on the dropship taking Octavia to the ground. She is horrified when he tells her in "Twlight's Last Gleaming":
156---> '''Bellamy''': I did this for you! To protect you. ''(reveals that he shot Jaha)''
157---> '''Octavia''': I didn't ask you to do that.... I didn't ask for any of this.
158* CharacterDevelopment:
159** Clarke goes from a naive AllLovingHero into a PragmaticHero willing to do morally ambiguous things to survive.
160** Bellamy starts as a selfish anarchist whose one redeeming trait is his care for Octavia, but grows into a dependable leader who genuinely cares about the others.
161** Finn begins the series as a charming, devil-may-care rebel but becomes TheConscience of the group, before descending into obsession in Season 2.
162** Octavia is impulsive, spontaneous, and rebellious, but matures considerably into someone willing to put her life on the line for those she loves.
163** Kane's initial characterization focuses on his willingness to do whatever pragmatic action was required in order to safeguard the Ark, but he gradually learns that a more caring approach can have even more beneficial results.
164** Jasper is awkward and dorky at the beginning, but is forced to grow up considerably in Season 2 after becoming the ''de facto'' leader of the 47 survivors in the Mountain. The events of the second season finale were especially hard on him. The third and fourth seasons continue following his downward spiral due to the copious character deaths in the series.
165** Raven's character development focuses on how she starts to depend less on [[LivingEmotionalCrutch Finn]] and more on herself.
166** Murphy starts out as a sadistic bully, is banished for it, and returns from his exile as a violent sociopath. But throughout Season 2 he learns to appreciate the help of others and skills he can offer them in turn, and by the events of the third and fourth seasons, he gradually becomes a [[HeelFaceTurn mostly trusted main character]] - albeit a somewhat amoral one.
167* CharactersDroppingLikeFlies: Characters in this show die rather frequently thanks to the AfterTheEnd setting and each season features at least one main character death along with several recurring and minor characters. And if you thought children were save on this show, a twelve-year-old Charlotte commits suicide by jumping off a cliff when she realizes she killed one of the delinquents.
168* AChildShallLeadThem:
169** After the 100 are joined by other members from the Ark, they are absorbed back into the official political structure headed by the Chancellor. Clarke, however, retains a position of power due to her history and influence with the Grounders. It culminates in a standoff in Season 2, where she speaks the line "You might be the Chancellor, but I'm in charge". In Season 3, her reputation as Wanheda, "The Commander of Death", continues to give her elevated standing with the Grounders and the Ark.
170** Season 2 introduces the the mysterious figure of "The Commander", who rules over all the Grounders. Though it is initially implied to be the older Gustus, it is actually Lexa, a young woman who has already been in command for years.
171** By the end of Season 4 Octavia ends up becoming the leader of [[spoiler:Wonkru, comprised of what is essentially the last remnants of humanity (as far as they know anyway).]]
172** In Season 5, [[spoiler:the Flame passes to Clarke's preteen adopted daughter Madi, the last known natural nightblood, and she leads Wonkru in the last episode.]]
173* {{Cliffhanger}}: After wrapping up the main storyline of each season, they love to leave a little cliffhanger to introduce the BigBad of the next season:
174** Season 1 ends with many of the main characters knocked out with gas grenades by what look like special ops troops. When Clarke wakes up, she’s in an all white quarantine room inside Mount Weather, revealing that they’re the Mountain Men the Grounders have been afraid of.
175** Season 2 ends with Jaha and Murphy having made their way to an oddly intact mansion on an island. Murphy sees a video telling how [[spoiler:an AI got nuclear launch codes nearly a century ago, while Jaha meets the AI itself.]]
176** Season 3 has the revelation that A.L.I.E. was [[spoiler:uploading human minds to the City of Light in order to make sure they would survive Praimfaya, a wave of fire and radiation that would likely kill everyone within six months.]]
177** Season 4 ends with a time jump. Even though [[spoiler: Earth was supposed to be survivable again after 5 years, it's been a bit more than 6 years later and no one has come down from space or out of the bunker. What Clarke thinks is her friends coming down from space turns out to be a prisoner transport ship coming back to Earth.]]
178** Season 5 ends with [[spoiler: the destruction of Earth, for good this time. Rather than waking up from cryosleep after ten years, it's been 125 years, Monty and Harper died but left a son, and he shows Clarke and Bellamy the new planet that Monty found, which might be somewhere they can survive and [[ArcWords do better]].]]
179** Season 6 ends with two big ones:
180*** [[spoiler: Sheidheda has been removed from the flame, saving Madi, but escapes to who knows where, and setting him up to be a major player next season.]]
181*** [[spoiler: Diyoza's previously unborn daughter, Hope, comes out of the anomaly as an adult. She talks to Octavia, who recognizes her even though she remembered nothing from her time in the anomaly just minutes before. Hope stabs Octavia in the stomach then passes out. Bellamy tries to hold Octavia up as she's bleeding out, until the anomaly comes in to the room and she disappears in a flash of green.]]
182* ColdBloodedTorture:
183** The 100 torture Lincoln when they are trying to find the cure for a poison. He refuses to break under the direct pain, but gives up the cure when he sees Octavia infect herself in front of him.
184** Murphy gets captured and tortured by grounders on no less than [[ButtMonkey three separate occasions]].
185** Lexa relates to Clarke a story about the death of her girlfriend in the backstory, who was kidnapped and tortured by a rival clan who thought she knew Lexa's secrets.
186** The Grounders have a tradition of subjecting criminals and their enemies to this when they execute them and for those who are guilty of doing mass killings they make them feel pain for each life they took which is shown to be by cutting them, but as stated by Lincoln they also will burn and dismember them also but the victims usually die before the torture gets that far. This was almost the fate for Finn because of when he massacred 18 villagers if Clarke didn't mercy kill him.
187* ColdEquation:
188** With only four months left of life support for the Ark's current population, the option is quickly raised to "reduce" the population to buy time to repair it. it is determined that three hundred people need to be removed in order for the remainder to have sufficient oxygen to survive. The original plan was for there to be an "accident" in crew quarters, but when the general population learned of the danger, three hundred people volunteered so that their families could live.
189** The Ark only has a single dropship ready to return to Earth, and it can only hold 700 people. The Ark's total population is over 2,000; who gets to go? The question is rendered moot when the dropship is stolen after a failed ''coup d'etat'', and crashes during its atmospheric entry.
190** Comes up again in Season 4, where there are increasingly limited slots to survive the AdvancingWallOfDoom, and Clarke has to make a list of who can stay in Arkadia.
191** In Season 5, the survivors in the bunker quickly realize that the hydroponic farms will not be able to feed everyone. A group tries to seize the floor with the farms and lock the others out and they are only stopped due to [[spoiler: Jahu's]] HeroicSacrifice. The population is then reduced by having criminals fight a DuelToTheDeath. When there is a bad harvest and the food situation turns critical, the leaders order [[spoiler: the cannibalization of the dead for food]].
192* ConLang: Trigedasleng, the [[EternalEnglish other]] language spoken by the Grounders, which seems to be at least partially based on English. The creator of the language, Creator/DavidJPeterson, says that it is derived from English, specifically from codes used by survivors to identify if someone was friend or foe. If you understood the words you were presumably a member of the group; it then developed into a language of its own with distinct rules.
193* CouldHaveAvoidedThisPlot:
194** The conflict between the Grounders and The 100 because the whole thing got started because of mutual misunderstandings and it is later shown that the Grounders could been reasoned with from the start when Anya agreed to meet with Clarke to negotiate peace, but the reasons the negotiations fail is that the 100 have unknowingly and accidentally burned down one of their villages when they shot up the flares to contact the Ark which made the grounders start to believe that the 100 are invaders who want to wipe them out and Jasper who was with Bellamy and others to secretly back up Clarke if something went wrong shoots at the grounders because he thought that Grounder bodyguards who were also secretly their with the same goal but to protect Anya, were planning to attack Clarke and that the negotiation was really a trap and this makes the conflict worse. Main point is that it is shown if one or both sides tried to talk to each other earlier the whole conflict possibly could have been avoided.
195** When Cage is ordering the Ark prisoners killed for their blood and bone marrow, Kane tells him that this is not necessary. When Cage ignores him, Kane screams how they can ''donate'' bone marrow and that there is no need to continue the slaughter. This lampshades that if Cage wasn't in such a hurry resulting in forced experimentation on the 100 and actually tried to explain the situation with his people to Clarke or Kane, they could have negotiated a way of getting bone marrow without killing and the whole conflict would have been prevented.
196** The conflict in Season 5 is completely unnecessary as the valley could support both populations. However, Wonkru and the convicts do not trust each other and each fear that if they lay down their weapons, the other side will enslave them. Clarke, Bellamy and Kane try to find a peaceful solution but cannot convince the leaders of the two groups.
197* CradlingYourKill:
198** In "Thirteen", [[spoiler:Titus accidentally shot Lexa while attempting to kill Clarke]]. Horrified at his actions, he helped carry her to a bed for treatment and cradled her afterwards.
199** [[BadassPacifist Luna]] cried over the body of her chipped lieutenant and apparent lover, whom she was forced to kill.
200* CrapsackWorld: The Ark is barely maintaining long-term life support, to the point where {{population control}} is in effect, adult criminals are executed [[AllCrimesAreEqual regardless of the severity of the crime]], and in times of emergency people are culled to reduce the load on the systems. Earth, while habitable, is a dangerous place even before the 100 discover that it is already inhabited by people who regard them as invaders. Survival -- for those who manage to survive -- often comes at the cost of great personal sacrifice and/or committing horrible acts against other people when their attempts to survive come into conflict with yours.
201* CruelMercy: When Lexa holds Emerson prisoner, she offers Clarke the final decision on his fate: Death or banishment. Emerson taunts her over the situation, reveling in the fact that though he will die, Clarke will have to live with her demons haunting her for years. Clarke decides to spare his life in order to help break the CycleOfRevenge which is threatening to lead to all-out war between Arkadia and the Grounders, but she also makes it clear that she knows this is worse for Emerson since now ''he'' has to live with his demons for the rest of his life. This ends up becoming a deconstruction of the trope when he comes back later in the season and almost kills her and [[RevengeByProxy all her friends]] as part of his revenge for what Clarke did to his family and his people. Clarke ends up admitting that she should have killed him when she had the chance because of this.
202* {{Cult}}: The series introduces at least four over the seasons. ALIE and the City of Light, Wonkru, Sanctum and the Primes, and the Disciples of a Greater Truth (actually an offshoot of another cult, The Second Dawn).
203* CultColony: Two:
204** Season 6 gives us Sanctum. It wasn't ''meant'' to be one; at least a couple of the original colonists were staunch atheists. But when the Primes discovered a form of {{Immortality}} by uploading their [[BrainUploading Mind Drives]] into [[BodyBackupDrive new host bodies]], they started raising all future generations of the colony in a cult that worshipped the Primes, [[RaisedAsAHost grooming them to willingly give up their bodies for the Primes' use.]]
205** Season 7 introduces Bardo, a planet inhabited by the Disciples. Unlike Sanctum, it very much started out this way, being founded by cult a cult escaping the devastated Earth.
206* CultureClash: A large part of the conflict between Grounders and Sky People involves this. This is mostly because of how violent and disturbing most of Grounder culture is compared to the way the Sky People/Ark people do things.
207* CurbStompBattle:
208** Bellamy's rescue team vs. Grounders. A group of juveniles up against hardened warriors born and raised in a [[DeathWorld hostile and lethal forest]] on the Grounders own territory. The rescue party is slaughtered almost to a man.
209** Octavia tries to go up against a seasoned Grounder warrior in "Survival of the Fittest." The end result is...not pretty. Fortunately for Octavia, her determination and spirit merited her training to improve her skills.
210* {{Cyberspace}}: The City of Light, created by Alie as a paradise for all human minds. It looks astonishingly like Vancouver.
211* CycleOfRevenge:
212** The source of the continuing conflict between the Grounders and the Sky People. Their initials conflicts came from mutual misunderstandings that lead to violence, and each side retaliated (Or were associated with retaliations by rogue members) in an ongoing cycle that outstripped any peace negotiations.
213** The cycle is mentioned in the third season when the Grounders and Arkadia seem ready to finally embark on their all-out war. After Pike launches an attack which kills three hundred Grounders that had been nearby to ''protect'' Arkadia, Clarke asks Lexa to simply ''forgo'' revenge. She admits that there is no justification or excuse for what has passed, but points out that no matter how justified retaliation will be it will only lead to more revenge, and the only way for Lexa to create peace is to decide not to participate. Lexa accepts and decides to break the cycle of revenge.
214** In the fifth season finale, Bellamy implores Madi to end the cycle of violence.
215* DareToBeBadass: After she was wounded during the Arkadia attack on her army, Indra was physically debilitated and regarded herself as weak. When Octavia asked for her help and was rejected, Octavia dared her to either waste away or stand up and take her revenge.
216* DaysOfFuturePast: The series is set in the future, and advanced technology like the Flame chip and the Ark's resources coexist with the Grounders, who have reverted back to a society comprised of tribes on the verge of war.
217* DeadlyGraduation: Each generation of [[RoyalBlood potential successors]] to the Commander's throne are trained together as children. They then fight to the death to see which one of them gets to be the next Commander.
218* DeadpanSnarker: Almost every character has their moment in the sun to snark. More often than not it's Bellamy, Raven and Murphy; especially when they all have scenes together.
219* ADeathInTheLimelight: "Spacewalker" focuses on Finn and Raven, showing part of why Raven is so devoted to him, and ends with his death.
220** The episode "Thirteen" takes place entirely in the Grounder capital Polis, with no scenes set in Arkadia. It gives more screen time to Lexa and Titus, and reconnects Murphy to the Polis/Arkadia plot. [[spoiler:Lexa is shot and killed by Titus, who hoped to kill Clarke and frame Murphy for the murder in an attempt to spur Lexa to declare war on Arkadia.]]
221* DeathOfAChild: Not even kids are safe on the DeathWorld. Preteen Charlotte is DrivenToSuicide and young Artigas is shown to be one of the victims of the Grounder massacre. Bellamy is notably conflicted about killing off the innocent kids in Mount Weather, but he and Clarke end up doing it to keep the Sky People safe.
222* DeathOfPersonality: What the Primes inflict on the hosts they [[BodyBackupDrive upload their minds into.]] [[spoiler:Done to Clarke by Josephine, but she survives due to A.L.I.E.'s neural mesh still being in her head.]]
223* DeathOfAThousandCuts: One Grounder punishment for particular crimes is for a criminal to be staked out in the open, then for every one of the victims or relations to give a single cut until death.
224* DeathIsNotPermanent:
225** Finn returns as a hallucination after Clarke mercy kills him.
226** Jaha has an hallucination of his dead son Wells when he is alone on the Ark trying to find a way to get to the ground.
227** [[spoiler:Lexa returning as an avatar of herself to help Clarke in the City of Light.]]
228** [[spoiler:Monty appearing in Clarke's mind-space after Josephine takes control over Clarke's body. He convinces Clarke to examine Josephine's memories.]]
229* DecapitationPresentation:
230** After the Ice Nation killed Costia to strike at Lexa, they had her severed head delivered to Lexa's bed.
231** Ontari kills and presents the heads of [[spoiler:all the nightblood children and to declare her victory in the conclave and become the Commander.]]
232* {{Dehumanization}}: Mount Weather turns people in to cannibalistic animals they call Reapers.
233* DemonicPossession: A.L.I.E. possesses Raven and uses her body as a her own.
234* DestinationDefenestration: Lexa tosses the Ice Nation ambassador off the high Grounder tower when the Ice Nation belligerence becomes too transparent.
235* DiedInYourArmsTonight: [[spoiler:Clarke held Lexa]] and comforted her as she died.
236* DivideAndConquer: The Mountain Men recognize that the danger comes from the union of Clarke's motivation and planning with Lexa's numbers and martial might, so they work to split the alliance between the Ark and the Grounders. They succeed in splitting them apart, [[DeconstructedTrope but without the luxury of a dominant position Clarke is forced to kill the entire Mountain population instead of allowing the civilians to survive unharmed as she had originally planned]].
237* DontMakeMeDestroyYou: Through the back half of Season 2, Clarke emphasizes to Lexa and the Grounders that their war with the Mountain is against its leaders and its policies: They will not slaughter its entire population. Once the engagement begins in earnest, she repeatedly asks their leaders to stand down or surrender instead of forcing her to kill them all. The Mountain refuses to negotiate, [[DownerEnding and she is forced to kill everybody]].
238* DontSplitUsUp: When Bellamy's sister, Octavia, is arrested, he volunteers to be exiled with her so they won't be separated.
239* DownerEnding: The two-part Season 2 finale has Mount Weather releasing their Grounder prisoners as part of a deal with Lexa which results in her taking her army and going home, leaving Clarke and the others to fight Mount Weather alone with some of their people about to have their bone marrow extracted and killed in the process. This forces Clarke into an escalating duel of wills with Cage Wallace, which eventually leaves her with no choice but to flood the mountain with radiation and kill all within, including Maya and several other innocents and allies. The remaining Sky People finally return home but Clarke can't bring herself to join them. In the B-plot, Jaha discovers that the nuclear warhead from the missile he rode to the ground has fallen into the possession of the [[AIIsACrapshoot insane A.I.]] that started the nuclear war in the first place and she wants his help with a unknown goal that will effect everybody.
240* TheDreaded: The "Reapers", a breed of Grounder so terrifying that even Anya and her tribe of hardened warriors don't dare venture into the tunnels that the Reapers call home.
241* DreamingOfThingsToCome: "Bitter Harvest" opens with Lexa being woken from her sleep by a nightmare of the deaths of the previous Commanders. Clarke assures that it was just nightmares, but Lexa believes that [[TalkingInYourDreams it is a warning from the Commanders]]: They believe she is betraying their legacy.
242* DrivenToSuicide: Pre-teen Charlotte (the youngest of the young convicts sent to Earth), guilt-ridden over having killed Wells in a misguided attempt to quiet her inner demons and unwilling to be the cause of any more bloodletting, jumps off a cliff to her death.
243* DroppedAfterThePilot: In the pilot, Abigail had a best friend called Callie Cartwig who was an important enough member of the Ark that she could act as liaison between the rulers and the people and speak on the council's behalf, and openly confronted Kane. She isn't even mentioned past the first episode.
244* DoubleStandardAbuseFemaleOnMale: Octavia's beating of her brother in 3x10 is framed in many ways as cathartic for the audience after Bellamy's actions in Season 3a, but the incident (and the lack of stronger intervention by bystanders) would not have been accepted, much less celebrated, by the audience had their roles been reversed.
245* DoubleStandardRapeFemaleOnMale: Ontari forces Murphy into having sex with her, by implicitly threatening to kill him if he displeases her. It's handled fairly lightly because he responds by smirking and [[DeadpanSnarker sarcastically]] saying "the things I do to survive", and visibly finds her attractive. But of course if the roles were reversed it would be a lot more disturbing. Slightly subverted when he later tells Emori very emphatically that he had no choice, and she appears to sympathize.
246* DuelToTheDeath:
247** Phase 2 of the Cerberus Program involves two Grounders killing each other for another dose of the PsychoSerum, which they're addicted to. Those that kill the loser go on to become Reapers.
248** This is the way a new Commander is chosen; all available Nightbloods are pitted against each other in combat, and the last survivor is made Commander. Often, the Nightbloods involved have all been raised together, and can include children or siblings.
249** According to the laws of the Grounder Coalition, only a unanimous vote by the ambassadors or death can remove the Commander. When Queen Nia is unable to secure all thirteen votes, she challenges Lexa instead, choosing her son Roan as Champion to fight in her stead in single combat with Lexa. [[spoiler:Lexa wins the fight, but instead of delivering the killing stroke against Roan she turns and hurls her spear into Nia on the sidelines]].
250* DueToTheDead:
251** The full Ark funeral prayer is "In peace, may you leave the shore. In love, may you find the next. Safe passage on your travels, until our final journey to the ground. May we meet again." It is often shortened to simply "May we meet again" as a traditional farewell between two people who are unsure if they will ever reunite.
252** The Grounder society is so wound up in combat that they only acknowledge an end to fighting when somebody dies: Their death prayer/blessing is "[[PeacefulInDeath Your fight is over]]" (or, as is more commonly said, "Yu gonplei ste odon," which translates to the same thing). Clarke's use of the phrase is a show of respect and is one of the first things to get Lexa's notice that she is more than just a 'normal' member of Sky Crew.
253** The Ark has a tradition of 'speaking' for the dead in a memorial service, where friends and loved ones of the deceased say a brief statement and leave an item of significance behind. When a memorial service is for multiple people, they are called up one after the others.
254** During his drunken depression in the beginning of the third season, Jasper stole the urn with Finn's ashes and took it back to the original camp the 100 had made around their dropship. What he ultimately intended to do with them is unknown, as he was extremely drunk at the time, passed out soon after his arrival, and accidentally spilled the urn after an argument with Monty. After the spill [[HeroicBSOD he collapses to the ground in tears]].
255** "From water we are born, to water we return" is this for the Boat People/Floukru.
256* DwindlingParty:
257** The 100 don't number a hundred for very long, much to the chagrin of their leaders. They were actually "the 98" within the first twenty minutes of the show. The producers have joked that by the end of the first season, they should be called "The 50". In the first season finale, Bellamy notes that 18 people have died out of the population of 102...and that's before the battle with the Grounders. In the second season, they have the additional threat of the Mountain Men wanting their ability to withstand radiation to contend with. By the second season finale 48 of the original 102 are left [[http://kimshum.tumblr.com/post/113459659631/ according to the staff]].
258** The band of followers Jaha takes with him to find the City of Light. By the second season finale's end, only he and Murphy are still alive. This is acknowledged by Abby in Season 3 when only Jaha returns.
259* DysfunctionJunction:
260** Clarke's mother directly had a hand in her father's death and Clarke herself spending a year in solitary confinement for simply ''knowing'' what her dad knew.
261** Bellamy and Octavia's mother kept Octavia hidden under the floor of their quarters for ''years'', because her existence was illegal due to strict PopulationControl. When this was found out, she was executed, Octavia was imprisoned, and Bellamy lost his spot on the guard.
262** Raven's situation is not too expounded upon, but it's mentioned that her mother was an alcoholic and neglectful and that it's somehow messed up enough that she considers Finn the only family she has.
263** Murphy had two loving parents until his father got floated stealing medicine for Murphy's illness and his mother spent the rest of her life blaming him, while drinking herself to death.
264** Monty is reunited with his mother in Season 3, but she has a deep hatred for Grounders and she backs up Pike's plan to rage a war on them, that even leads to her betraying Monty.
265* {{Dystopia}}: The Ark isn't a great place to live, what with [[AllCrimesAreEqual harsh laws]] and the tight restrictions on resources and [[PopulationControl population]], but it's mostly just a matter of trying to survive on limited resources. It's not without reason that the kids are happy to be seemingly left to their own resources on Earth.
266* EarthThatWas: In the last scene of Season 5, it is revealed that [[spoiler:Monty didn't think Earth would recover again from the ''Damocles'' strike in their lifetimes, so he redirected the Eligius ship to a new habitable planet. By the time the survivors wake up from cryo, they've been gone from Earth for 125 years.]]
267* ElaborateUndergroundBase: [[https://en.wikipedia.org/wiki/Mount_Weather_Emergency_Operations_Center Mount Weather]], as in RealLife.
268* EmotionsVsStoicism:
269** A difference between Clarke and Lexa. Lexa believes that LoveIsAWeakness and that Clarke should follow her example if she wants to be an effective leader. Clarke tries and comes to the conclusion that closing yourself off to all feelings is pointless.
270** One of the significant differences between Clarke and Bellamy. Despite the above, Clarke is a more logical/necessity-based decision maker, while Bellamy tends to run more emotional/instinctive. She even refers to the two of them as people who think with their head and heart respectively. [[HourglassPlot Flipped around a bit]] in Season 5, where Clarke points out that she's now the more emotional decision maker between the two of them.
271* EmpathyDollShot: Dolls or toys are sometimes found and focused upon in pre-war ruins, calling to mind the children's death. The second season finale has the soccer ball that some of the Mountain Men children were seen playing with - in the scene where they have all died from radiation, it makes a reappearance at the very edge of the screen, hinting at the children's corpses just beyond it.
272* EndOfAnAge:
273** By the end of Season 4, the status quo of the first three seasons is broken completely. [[spoiler:Due to the Praimfaya wave all remaining twelve clans are forced to become one (called Wonkru) and 100 survivors from each clan band together to survive the radiation. Not only does this remove all of the individual clans from the equation but for the first time in Grounder culture the leader of their new people is no longer a Nightblood but instead a former member of Skaikru Octavia. Indra even {{lampshade}}s this noting that the time of the Commanders has passed.]]
274** Done ''again'' at the end of Season 5 -- this time, [[spoiler:the survivors -- Clarke and Madi, Bellamy and the characters sent to space, Wonkru, and Eligius -- ''aren't coming back to Earth at all'']].
275** By the end of Season 6, with Abby and Kane's death, none of the original "adults" are left.
276* EnemyMine:
277** Clarke works with Anya to escape Mount Weather in "Reapercussions," and despite their conflict throughout the escape Anya agrees to propose an alliance to the Grounder Commander against the greater danger of the Mountain. Unfortunely, Anya is mistaken for an attacker by Ark security personnel and killed before she can return.
278** Camp Jaha and the Grounders are mistrustful of each other, but are willing to work together to take down Mount Weather because they both have people trapped inside. The Grounders break the alliance when they make a separate deal with Mount Weather.
279** Queen Nia of the Ice Nation allies herself with [[spoiler:Emerson, Last of the Mountain Men]] in order to go after Clarke and the Coalition.
280** Everyone especially Octavia are forced to work with Pike who caused problems for them earlier in the season and is also responsible for Lincoln's death to take on A.L.I.E.
281* EternalEnglish: After a hundred years of mutual isolation, the Sky People, Grounders and Mountain Men can all understand each other perfectly fine in English, although the Grounders do have their own ConLang as well.
282* EverythingTryingToKillYou: Subverted. The characters believe this to be the case. But despite talks about how "everything" is toxic on Earth, plants and animals do not seem to be any more or less dangerous than the natural flora and fauna of the real world. By the second season the Sky People have learned how to naturally survive, and most of the conflict is actually [[HumansAreBastards interpersonal]].
283* EveryoneHasStandards:
284** Even the strictly controlled dystopia of the Ark [[WouldNotHurtAChild is reluctant to kill children]], holding them until they are eighteen to receive a trial then.
285** Murphy has shown himself to be a general {{Jerkass}}, who is quite comfortable with cold-blooded murder when he's not out being the local bully. But even he is horrified when Finn attacks a village, starts threatening them, and then cracks and starts slaughtering them. Likewise, later when Jaha sacrifices their companion to a sea creature to keep him and Murphy from getting eaten, Murphy is horrified and refuses to continue traveling with Jaha.
286** The President of Mount Weather, for all that he appears to be somewhat shady and cagey, does refuse to countenance forcing the teenagers in the complex to be experimented on.
287** Whatever Josephine's eugenics proposal entailed, it was too heartless and dehumanizing for even the other Primes to support it.
288* ExactTimeToFailure: In Season 2, one of the Mountain Men is kept alive to deliver a message by foot to Mount Weather. He is given 6 hours of oxygen to make an 8-hour walk.
289* ExplainExplainOhCrap: Finn and Clarke were talking about how her friend Wells betrayed her.
290-->'''Finn:''' Are you sure Wells told his dad?\
291'''Clarke:''' He's the only person I told.\
292'''Finn:''' But is he the only person who ''knew''?\
293''[Clarke stops to think for a moment. The only other person who knew was... her mother.]''
294* EyeScream: After Lexa's death and Ontari's murder of all the other Nightbloods, the latter gouges a Grounder ambassador's eyes out in retaliation for him having challenged her rule one too many times.
295* ExtremelyShortTimeSpan: Each season covers a relatively short amount of time. Happens in a more extreme way in later seasons. Can make the [[TimeSkip time skips]] a little awkward, since they cover a lot of character development we don’t get to see.
296** Season 1: 29 days
297** Season 2: 23 days (followed by an 83 day time jump)
298** Season 3: 29 days
299** Season 4: 36 days (followed by a 6 year, 7 day time jump)
300** Season 5: 20 days (followed by a 125 year time jump, though the characters are unaffected due to the [[HumanPopsicle cryopods]])
301** Season 6: 11 days
302* FaceHeelTurn: While a lot of the characters deal with the HeelFaceRevolvingDoor, Luna actually goes through this. She goes from a non-violent pacifist to being fully ready to let the entire human race die, including herself, after crossing the DespairEventHorizon. She goes about this by entering the final conclave to violently make sure ''no one'' gets the bunker.
303* FacialMarkings:
304** The Grounders bear both facial tattoos and heavy makeup around their eyes. Their exact meanings have not been revealed, but they seem to indicate origins of clans and ranks within them.
305** Later, Ice Nation (Azgeda) members are seen to be identifiable by large decorative facial scarification and white face paint.
306* FakeOutMakeOut: Jasper and Maya do this in "Remember Me" to cover up that they were sending out a radio message to the Ark survivors.
307* FakingTheDead: Removing the wristband monitors makes the wearer appear to be dead as far as the people back on the Ark know. After the landing, Bellamy wants to make it appear that The 100 all died so the Ark won't send anybody else down, leaving them free to live by their own (lack of) rules. After realizing that this was a ''terrible'' idea and learning that the Ark is going to have another culling soon due to the ground apparently being confirmed uninhabitable, it's a race to signal the Ark that they're not dead.
308* FamilyOfChoice: Because of their time on the ground away from the adults in space and the hardships they undertook to survive, the 100 become fiercely protective of each other and consider each other family.
309* {{Fanservice}}: The initial episodes had Octavia and Bellamy frequently in revealing clothing as they reveled in being free on Earth, but this aspect was dropped from the show before the end of the first season. All characters are dirty, wounded and swathed in armor and makeup as required by their station.
310* {{Fan Disservice}}: "Perverse Instantiation – Part 2" includes a scene where Ontari's shirt is cut open [[spoiler: as is her chest, because she's brain-dead, and Abby and then Murphy have to ''manually'' keep her heart beating and send Nightblood from Ontari to Clarke so she can complete her mission.]]
311* FantasticRacism:
312** The conflict between the members of the Ark and the Grounders are that both sides having a negative opinion of each others culture and beliefs and the fact that [[JustifiedTrope both sides have killed members of the other]].
313** {{Mutant}}s known as Nomadic Grounders are shunned in Grounder society, traditionally killed in infancy. If a parent chooses not to kill the child they must be exiled from the community and sent to the wastelands.
314** Most of the residents of Mount Weather see the Grounders as savages and this is why they didn't have a problem with the experiments on them.
315** The Farm Station survivors hate and distrust all Grounders after spending months on the ground [[JustifiedTrope being attacked by the Ice Nation and only having the knowledge that they were at war with the Grounders while having no contact with the other Ark survivors]]. This keeps up even after relocating to Arkadia and learning that there are friendlier Grounders, culminating in now-chancellor Pike slaughtering a Trikru army, which was supposed to be an ''ally''.
316* FantasyCounterpartCulture: The Grounders are increasingly looking like the First Nations, especially in relation to the would-be colonizers from the Ark.
317* FantasyGunControl: The Grounders do not have any technology resembling firearms, not even primitive explosives. Season 2 reveals that this is enforced by the Mountain Men; they destroy the entire village of any Grounder who so much as touches a gun, so the Grounders live in superstitious dread.
318* FelonyMisdemeanor: Due to AllCrimesAreEqual on the Ark, the tiniest misdemeanor is the same under the law as cold-blooded murder. However, although they are punished equally by the law, Ark society hasn't come to view misdemeanors as death-worthy offenses and instead resents the laws, at best accepting them as a brutal necessity.
319* FireForgedFriends: During the pilot, five of the main cast, Clarke, Octavia, Jasper, Monty and Finn go off to Mount Weather to get food and supplies. During this hike, Jasper saves Octavia from being killed by a snake and then, after he tries to show off his courage, gets ImpaledWithExtremePrejudice. The other four (except Octavia because she's injured from the snake) plus Bellamy go to save him. This results in them all becoming close friends.
320* FirstEpisodeTwist: The reason the 100 were sent to Earth is because the Ark is dying, a fact those in charge are trying to keep from the general populace. The Earth is also not as empty as they Ark had believed.
321* ForYourOwnGood: A recurring theme in the Grounder story-arcs is Lexa's loyal subordinates believing that her working with the Sky Crew will bring about her own destruction, so they attempt to trick her into breaking away.
322** Gustus, Lexa's bodyguard and close confidant, poisoned himself in an attempt to frame Raven as attempting to assassinate Lexa. He feared that working with the Sky Crew would lead to a weakening of Lexa's position and risk her death, and he wanted to preemptively destroy any potential alliance so that she would be safe. His plan was exposed and, in Grounder custom, [[DeathOfAThousandCuts he is tortured to death]].
323** Titus, the Flamekeeper and Lexa's teacher and advisor as Commander, opposes Lexa's admission of Arkadia as the thirteenth clan and argues strenuously against all of Lexa's attempts to forge a peace. He believes that such actions will only weaken her position and lead to her death at the hands of her own people and the fracturing of the Grounder Coalition, so he does everything he can to push her to a more violent path. [[spoiler:Ultimately, he attempts to murder Clarke and frame Murphy for the deed so that Lexa will be spurred to vengeance against Arkadia, but he accidentally kills Lexa instead.]]
324* {{Forgiveness}}: Clarke and Bellamy are good at forgiving each other for the heinous crimes they've committed, but cannot forgive themselves.
325* FourLinesAllWaiting: The first part of Season 2. By the fifth episode, they've converged.
326** Clarke escaping Mount Weather along with Anya, leaving the rest of the surviving 100 behind. After Clarke makes it back to Camp Jaha, scenes with Jasper, Monty, and Miller fill in this plotline.
327** Bellamy, Murphy, and Finn searching for Clarke and the others.
328** Abby and Kane struggling to lead Camp Jaha.
329** Octavia trying to find Lincoln and the others, coming into conflict with Grounders.
330** Jaha crashlanding on Earth after being left behind in "We Are Grounders pt. 2" and making it back to his people.
331* FreezeFrameBonus: Pausing shots of the drawings present in Clarke's drug-induced hallucination in "Day Trip" show future developments like the [[EarlyBirdCameo Polis skyscraper and the "backpack" A.L.I.E. is contained in]].
332** Computer screens throughout Season 4 contain references to an Eligus Corporation and their deep-space operations, which foreshadows the Eligus ship that returns at the end of the season.
333* FriendOrIdolDecision:
334** There is a possible truce between the Grounders and Camp Jaha in order to deal with Mount Weather. But, to solidify it, the Grounders want Finn to die for killing all of the innocent people at the village. Clarke chooses the alliance.
335** At the climax of Season 2, Cage offers Lexa a deal: He will let all of the Grounder prisoners be released in return for her abandoning the Sky People. Lexa chooses her duty to her people--even though she's obviously in pain, and official commentary says she had genuinely fallen in love with Clarke.
336* FutureSlang: {{Averted}}. Slang doesn't appear to have evolved much at all during the last 97 years. A single exception is the term "floated"; used to refer to [[ThrownOutTheAirlock spacing]], it has come to be a catch-all term for being killed that persists even after returning to Earth. It's also used as a slur, as in "go float yourself".
337[[/folder]]
338
339[[folder:G-L]]
340* GenderBlenderName: Main characters Clarke (female) and Bellamy (male).[[note]]Out-of-universe, they were named for Creator/ArthurCClarke and [[Literature/LookingBackward Edward Bellamy]] respectively.[[/note]] This also applies to some other characters like Indra (named for a generally male Hindu deity).
341* GenocideDilemma: This comes up in both the second and fourth seasons.
342** The end of the second season comes down to a question of whether Clarke will kill the entire population of Mount Weather, including those who aided her friends, or allow the Mountain Men to kill her friends. [[spoiler: She and Bellamy ultimately go through with it, killing off the entirety of the Mountain Men population.]]
343** In Season 4, Clarke is made to choose whether to save only her own people from Praimfaya, [[spoiler: a massive wave of radiation that will kill everything on Earth that isn't protected by a bunker]] and doom every single Grounder to death, or to save some Grounders and possibly cause the death of her own people. [[spoiler: She chooses to allow the Grounders to be wiped out, but Bellamy takes the decision out of her hands]].
344* GildedCage: How Clarke sees Mount Weather, contrasting Jasper's view of it: They have great facilities, they are cared for, and the president actually seems like a pretty stand-up guy, except that the 100 are not allowed to leave and Clarke fears that they have an ulterior motive. Ultimately, the Mountain Men begin to kill the Sky People to harvest their blood and bone marrow.
345* GiveMeASword: While engaged in a DuelToTheDeath with Lexa, Roan's sword is taken away and used against him. Without a weapon of his own, he runs up to one of the guards overseeing the event, punches him across the face, and takes his spear to use.
346* GreaterScopeVillain: Season 1 focused on petty squabbles between the 100 and the Trikru. Come Season 2, we are introduced to the Mountain Men, who the Grounders greatly fear, whose kidnapping of both Grounders and Skaikru forces a plot of cooperation between the Trikru and Skaikru leaders. Season 3 ups it again by introducing the ''murderous A.I. that started the nuclear holocaust in the first place'' against an increasingly fragile alliance among the clans. Season 4 tops them all by [[spoiler:focusing on [[AdvancingWallOfDoom the Praimfaya death wave]], which motivated ALIE's actions in the last season.]]
347* GreenEyedMonster:
348** Raven is very jealous after she risks her life to come down Earth to find Finn, only to find that he has slept with Clarke and continues to prioritise his feelings for her. This isn't helped by people repeatedly drawing attention to it.
349** The trope is downplayed in Season 2, as Monty is noticeably irritated that the budding romance between Jasper and Maya is driving a wedge between Jasper and Monty's old friendship.
350* HairContrastDuo: Blonde, idealistic, caring Clarke with, well, pretty much everyone she interacts with at first, especially her more pragmatic mother and the older, moodier Bellamy. After she has made the damning moral compromises at the end of Season 2, her hair has been artificially darkened at the start of Season 3.
351* HardTruthAesop: In "Murphy's Law," it's flat-out stated by Clarke that sometimes you should lie to people because at times telling the truth might cause too much misery.
352* HatePlague: On Sanctum, the eclipse of the two suns causes plants to release a chemical that turns any animal who breathes it (humans included) insanely delusional and violent. Everyone is affected differently, with most people trying to hurt each other: [[spoiler: Emori tries to murder everyone, Echo is in so much pain she sedates herself, Bellamy becomes so paranoid he wants to kill Clarke, Nathan and Eric both believe that bugs are trying to eat Nathan resulting in Eric attacking Nathan in the belief he is saving him, Clarke thinks her mother is telling her to kill herself, and Murphy is totally unaffected]].
353* HereditaryRepublic: The Wallace family has held the Presidency of Mount Weather for three generations.
354* HeKnowsTooMuch: Clarke's father was executed because he found out that The Ark was running out of life support systems and tried to go public with the information. Clarke herself was imprisoned, as her dad told her about this before getting arrested.
355* HistoryRepeats: "Unity Day" in the first season revealed that the twelve space stations only came together to form the Ark after a thirteenth station had already been destroyed; in Season 3, the Arkadian settlement is offered a chance to join the Twelve Tribes in the Grounder coalition. Clarke explicitly states that they have a choice of either becoming the thirteen tribe or being the thirteenth station again. [[spoiler:The Arkadian leaders [[DefiedTrope defy a repeat of history and choose to join the coalition]]]].
356* HonorBeforeReason: Particularly in seasons 1 and 2, Grounder characters' decision making frequently goes against their own best interests because of their often blind adherence to tradition, extreme hostility to outsiders, and resistance to change.
357* HufflepuffHouse: The Grounder Coalition is made up of 12 Clans, but the only ones that get any development or screen-time are the Woods Clan (The Tree People or ''Trikru''), the Ice Nation (''Azgeda''), and the Boat People (''Floukru''). The creators have named and given logos to the other 9, but they ultimately play relatively minor roles.
358* HumanResources: Season 2 reveals that the Mountain Men have used Grounder blood to treat their weaknesses to radiation, and in Season 2 begin to harvest bone marrow from the Sky People as well.
359* HumansAreBastards: Although the 100 initially believe that [[EverythingTryingToKillYou the environment will be their biggest challenge]], it quickly becomes apparent that the humans on the show are constantly at each other's throats, with progress towards peace always getting derailed. This is part of why [[spoiler:Jasper decides to kill himself, having given up on humanity.]] Monty calls back to this in the Season 5 finale, asking Clarke and Bellamy to defy this now that [[spoiler:the survivors have been given a second chance on a new planet.]]
360* ICannotSelfTerminate: Clarke punctures Atom's jugular to spare him a more drawn-out death after he's burned so badly by acidic fog that he can barely move and is begging to die.
361* IDidWhatIHadToDo: Multiple people on the Ark claim they alone are doing what must be done. This becomes a recurring theme throughout the series as multiple characters on all sides of the conflict find themselves forced to unfortunate actions.
362** Kane uses it to justify ordering Abby's execution for breaking a minor law to save Chancellor Jaha, while she says she did what she had to do to save Jaha so Kane would not become Chancellor.
363** Bellamy and Pike use this to excuse slaughtering three hundred friendly Grounder soldiers in their sleep.
364** Clarke uses this exact phrase to excuse an increasing number of morally dubious choices that tend to result in a lot of people dying.
365--->'''President Wallace:''' None of us has a choice anymore.
366** In Season 5, when the soybean crops die, it's [[spoiler:not just cannibalism but ''forced'' cannibalism, on penalty of death, that is what gets Wonkru to survive. No wonder they call it the Dark Year.]]
367* IHaveNoSon:
368** When Octavia chooses to stay and help Bellamy rather than retreat with the rest of the Grounders, Indra says that she is no longer her second.
369** Octavia outright tells Bellamy that "[he's] dead to [her]" due to his indirect role in [[spoiler: Lincoln's death]].
370** A chilling example is when Jaha talks about the pills to "the City of Light" and how they take away pain by making you forget the thing that causes it. Thus, when Abby asks how Jaha's son would feel about this, Jaha honestly doesn't even remember the boy's name.
371** In Season 5, Bellamy tells Clarke, "That's not my sister" after seeing how the bunker has changed Octavia. After she [[spoiler: puts him in the fighting pit and sentences him to death,]] he outright tells her that he wishes she were dead. Later, during the march to Shallow Valley:
372--->'''Bellamy:''' I'm not doing this for you. I'm fighting to get back to my family.[[note]]He refers to his fellow members of "Spacekru" as this earlier in the season[[/note]]
373** Bellamy takes this a step farther in Season 6, telling Octavia, "My sister died a long time ago."
374* IJustShotMarvinInTheFace: In "Thirteen", [[spoiler:Titus]] attempts to kill [[spoiler:Clarke]] and uses a gun in the hopes of framing the Sky Crew. Since the Grounders [[FantasyGunControl have no firearms]] he is unfamiliar with its use, and when he is firing wildly he [[spoiler:[[AccidentalMurder kills Lexa instead]].]]
375* IKnowYouAreInThereSomewhereFight: When Bellamy sides with Pike over Kane, Clarke believes that if she can reach him she can convince him that peace with the Grounders is the best option. She pleads with him not to turn into somebody who believes that war is the better option and to work together to find a solution for everybody. Bellamy refuses her call, claiming this is who he always ways, and that his better actions with Clarke and Octavia were when he was acting out of character. Double-subverted in the back half of Season 3, where he admits that he regrets his actions and now has to live with the consequences.
376** Bellamy has a similar conversation several times with Octavia throughout Season 5. She tells him, [[spoiler: "You can't save someone who's already dead."]]
377** Clarke crosses this with StopOrIShootMyself in the Season 6 finale. [[spoiler:When she sees that Sheidheda has taken over Madi’s body, she threatens to shoot herself if Madi can’t take back control. It works just long enough for Madi to order Russell taken hostage, at which point Sheidheda starts [[BattleInTheCenterOfTheMind killing her from the inside]].]]
378* ImAHumanitarian: [[spoiler:Two years into their five-year stay in the Second Dawn bunker, a fungal infection renders the soybean crops in the hydrofarm unusable. While they can recover the crops after one year, that leaves a year of the "other, other white meat" as their only protein source.]]
379* TheImmune:
380** The Grounders and the Ark-survivors are able to live on the surface because they had adapted over time, with natural selection ensuring that immune grounders passed it on and the Ark-survivors grew up with solar radiation, which is even stronger. The people who live in the underground base didn't, so any exposure to the outside world could kill them.
381** Octavia, Jasper, and Finn are immune to the virus the Grounders send to weaken the camp.
382** The Nightblood are the only ones able to survive the [[spoiler:radioactive Black Rain]] though they're in a lot of pain in the first exposure. As it turns out, they can also survive [[spoiler:the increased radiation from Praimfaya, though not the front wave of it.]]
383* InNameOnly: The show keeps the basic premise of the books (a hundred juvenile delinquents sent down from space, four of whom are named Clarke, Bellamy, Octavia, and Wells) and very little else. Justified as, when the series was commissioned, the first book hadn't yet been published (though the premise was known).
384* IncrediblyObviousBomb: A grounder sets a dramatically ticking bomb in Mount Weather.
385* InfoDump:
386** The pilot starts with a rather massive one that manages to load the main backstory into a couple of minutes of narration and AsYouKnow conversations.
387** There's another one at the end of Season 4 after a TimeSkip. [[spoiler:Clarke, in a daily transmission to Bellamy, lays out the state of the world after Praimfaya, though she's aware that she might be talking to no one.]]
388* IntergenerationalFriendship: Murphy and Jaha on their journey in Season 2. They do grow closer, but it's also happening in the middle of Jaha's SanitySlippage, and their friendship quickly sours.
389** [[spoiler:Octavia and Diyoza also bond to some degree in Season 6, after admitting to being no different and both had been exiled from Sanctum. Then in season 7 they become HeterosexualLifePartners and raise Hope together.]]
390* IntimateArtistry: In the opening scene of the episode "Bitter Harvest", Clarke sketched a portrait of Lexa [[BeautifulDreamer as she slept]]. The sketching shows both Clarke's growing feelings for Lexa and also Clarke's general acceptance of Grounder living, as she hasn't done art since before being sent to the ground. After she awakes, Lexa discovers the drawing.
391* InternalDeconstruction: Season 5 reverses the dynamic of Grounders vs. Sky People, with the protagonists on the ground and a new group of criminals as the colonists from the sky. Many of the same beats are repeated, but with characters are much more experienced and try to make different choices, and recognize why their choices in Season 1 were moronic or foolhardy.
392* InvoluntaryBattleToTheDeath: The Grounders force this on Jaha and Kane, with the ultimatum that both of them will die if they refuse. They resist for two days instead discussing how to broker peace. Turns out to have been a SecretTestOfCharacter by Lexa, who had posed as a slave girl in the same cell in order to decide whether their desire for peace was genuine.
393* IronicEcho:
394** In the second episode, Murphy chides Finn for thinking that 'the rules' do not apply to him. Finn responds with Murphy's own philosophy: "I thought you said there are no rules."
395** In the third episode, 'slaying demons' is used to refer to facing fears and overcoming obstacles. Charlotte takes the wrong lesson from this and, as she kills Wells, repeats "I have to slay my demons."
396** "Murphy's Law": "The less you know, the better."
397** "I Am Become Death" has the single word "Bygones." Murphy first says it to a former enemy to convince him that he is no longer holding a grudge, then later repeats it when murdering said former enemy (because he was definitely holding a grudge).
398** In "Coup de Grace": "You have to trust that I know what's right for us."
399** Just before taking Jasper away to harvest, Doctor Tsing says to the teens "I want you to know, you're very special to us." When she is afterwards dying from radiation poisoning, Jasper and other members of the 100 stand over her and repeat the words.
400** In "Blood Must Have Blood, Part 2", Lincoln injects Cage with the same drug used to turn Lincoln into a Reaper. As Cage dies, Lincoln says "the first dose is the worst, " the same thing Cage said when he first dosed Lincoln.
401** In "How We Get to Peace," Bellamy repeats his familiar, "My sister, my responsibility" as he [[spoiler: drugs Octavia to prevent her from executing Clarke and giving him a chance to negotiate for peace. Instead of protecting Octavia, he is now protecting everyone else ''from'' her.]]
402** In "Damocles, Part 2," Monty, [[spoiler:having aged many years since the others had been put into cryo, mentions in a video message to Clarke that she was right about Harper's dad's genetic condition when Clarke excluded her from the list of 100 people to survive Praimfaya in the Ark, as it did eventually kill her. But the irony is double-edged, as Harper did live long enough to have a child, something the list was meant to be weighted towards.]]
403* JerkassHasAPoint: In "Murphy's Law", Murphy is brutally beaten and nearly hanged for a murder he didn't commit after Clarke accuses him loudly and publicly without considering the consequences. Afterwards, when Murphy wants to execute the ''actual'' murderer, even Clarke realizes that she should have handled the entire situation more quietly from the beginning. Murphy's main argument is also that if they were willing to execute him on no evidence whatsoever, it's only fair that the same penalty apply to the actual confessed murderer, even if she's only 12 years old. It's not an entirely unreasonable point.
404* JustAKid: The adults of Camp Jaha repeatedly dismiss Clarke, Bellamy, Finn, Raven, etc. and insist on enforcing their way of doing things, despite the 100 knowing more about Earth by the time they arrived, because they're "just kids".
405* KangarooCourt: The Commander of the Grounders allows them to put Finn on trial, but expects they will condemn him to death because of his crime.
406* KarmicDeath: In the finale of Season 2, Cage dies from the very drug he used to turn Grounders into Reapers, ''and'' the very syringe he was about to inject Lincoln with. The event even comes with an IronicEcho.
407* KlingonPromotion:
408** Done in Season 3 when Nia, the Queen of the Ice Nation, has challenged Lexa's authority as the Grounder Commander. When she selects her son Roan to fight Lexa in TrialByCombat, Clarke approaches him and tries to persuade him to kill his mother instead and thus become King. Roan considers it, [[SubvertedTrope but declines because he knows that the Ice Nation would never forgive him or accept him as their King in that situation]]. [[DoubleSubverted He does, however, offer to help]] ''[[DoubleSubverted Clarke]]'' [[DoubleSubverted kill her instead]]. [[spoiler:Nia survives Clarke's assassination attempt, but during the fight between Lexa and Roan, Lexa spares Roan and kills Nia on the sidelines. She then declares Roan King of the Ice Nation]].
409** Played straight with Ontari who become the commander when she [[spoiler:kills all the nightblood children who were her competition in their sleep]] but subverted in the fact that she is a FakeKing because [[spoiler:Titus gave the Flame to Clarke to give to the other candidate Luna because he didn't agree with what Ontari did and without the Flame]], Ontari can not be the official leader.
410* LastEpisodeNewCharacter:
411** Both the Mountain Men (the antagonists of Season 2) and A.L.I.E. (the antagonist of Season 3) were shown in the last minutes of the last episode of the season prior to their official introduction.
412** Jordan is introduced in the final act of the Season 5 finale.
413** Hope turns up in the last minute of Season 6.
414* LastFertileRegion: The conflict of Season 5 revolves around who gets to take ownership of Eden, the last green spot on Earth following Praimfaya. [[spoiler:The season ends with it being destroyed with the Damocles launch.]]
415* LastOfHisKind:
416** As of Season 3, [[spoiler:Emerson, Last of the Mountain Men, is the SoleSurvivor of the people of Mount Weather]]. But subverted when he dies later making his people officially extinct.
417** After [[spoiler:Ontari's]] death in the penultimate episode of Season 3, [[spoiler: Luna]] remains the last known living [[spoiler: Nightblood]], but it is implied that there may be others in other villages and clans.
418*** Abby's experiments later turn Clarke into [[spoiler:a Nightblood. During the six-year TimeSkip, she finds Madi, who is all but stated to be the last remaining natural-born nightblood.]]
419** The radiation [[spoiler:kills everyone from Floukru save Luna, due to her nightblood resistance. Thus she's a ''double'' example.]] Unforunately, this loss drives her over the DespairEventHorizon and she becomes a StrawNihilist, [[spoiler:leading to her death at Octavia's hands.]]
420* LastNameBasis: (John) Murphy, (Nathan) Miller and (Zoe) Monroe are referred to by pretty much everyone by their last names. To a lesser extent, (Thelonius) Jaha, (Charles) Pike, and (Marcus) Kane are this to the younger characters, but Abby and other adults call them by their first names. (Eric) Jackson and (Jacopo) Sinclir are usually addressed and referred to by surname alone. This becomes slightly confusing in the cases of characters like Bellamy, Harper, Fox, Miles, Jackson, Bryan - names that could realistically be either a first or last name.
421* LastRequest: As she dies accidentally at his hand, [[spoiler:Lexa makes Titus swear that he will never again try to harm Clarke. He agrees and swears to it.]]
422* LaymansTerms: Abby pulls one of these with Raven in "Fog of War" while they listen to jammed radio frequencies.
423-->'''Abby''': ''That sounds clear to you?''
424-->'''Raven''': ''Will be once I crack the encryption.''
425-->'''Abby''': English, ''Raven. What does that mean?''
426* LegendFadesToMyth: The First Commander began the process of uniting the Grounder Tribes in the city of Polis, created the original Nightbloods, and upon her death [[BornAgainImmortality her spirit chose her successor]], who in turn chooses the next Commander as the chain continues down. "Thirteen" reveals that the First Commander was [[spoiler:Becca, the technology innovator who created A.L.I.E., the AI which ended the world. Becca had been living aboard the space station ''Polaris'' trying to create a new AI to repair the damage and save the world, and fled to Earth when others on her station learned her connection to A.L.I.E. She used her blood to store information and passed it on to the Grounders she encountered, and the successful AI she developed is implanted in each successive Commander]].
427* LetThemDieHappy: Kane's mother is the leader of the small religious sect on the Ark which cares for a sole tree through offerings of water, which he finds embarrassing and tries to distance himself from. Despite having earlier claimed to have forgotten their prayers when she asked him to transport their tree to the ground, when she is wounded by the bombing on the Ark Kane recites the prayer over her as she dies, causing her to smile before the end.
428* LightIsNotGood:
429** Our first glimpse of Mount Weather is in an all-white room, with Clarke in an all-white outfit. Everything is cleaner and more orderly than the Grounders, and the people are more polite. They are, however, the driving villain of the second season, whom even the Grounders fear and hate.
430** [[BigBad A.L.I.E.]]'s proposed utopia is named "The City of Light."
431* LivingIsMoreThanSurviving: A repeated theme throughout the show, and discussed by Clarke and Lexa. Lexa takes the position that survival is the most important issue in life, while Clarke takes the position that people as people deserve more. Ultimately, Clarke convinces Lexa that they ''do'' deserve more than just survival.
432[[/folder]]
433
434[[folder:M-S]]
435* MachineWorship: Jaha and the City of Light followers toward the artificial intelligence ALIE.
436** Again with the people of Sanctum towards the Primes (though it's unclear if the average Sanctumite is aware that the Primes' "rebirths" are done via [[BrainUploading Mind Drives]]).
437* MagicalDefibrillator: Abby uses a shock stick to restart Lincoln's heart.
438* MakeAnExampleOfThem: "Thirteen" reveals that the original thirteenth space station did not ''refuse'' to join the other twelve stations to form the Ark, but rather the American space station decided to destroy it as an example to the others that they would need to accept draconian measures if they were to survive. The fact that the station had ''appeared'' to be refusing to join the Ark because of internal events gave a very good excuse.
439* MauveShirt: Initially the series focuses on the main cast trying to lead the 100, so some minor delinquents are given a bit of personality before their inevitable doom. Lampshaded by Myles, who comments that he and the main cast don't really hang out much. He's offed later in the same episode.
440* MeaningfulEcho:
441** In "The Calm", Jaha informs Kane that the actions he took to help the survivors of the Exodus ship disaster were against the law. Kane responds that a wise man once told him that you have to know when ''not'' to follow the law, a CallBack to Jaha and Kane's conversation in the Pilot.
442** The phrase "May we meet again" is used frequently by the Arkers, in both temporary-but-uncertain goodbyes and as last rites to the dead. Lexa repeats the Ark phrase to Clarke in "Blood Must Have Blood, Part 1" echoing Clarke's use of the Grounder rites over Finn in "Remember Me".
443** From the Season 2 finale, "Blood Must Have Blood, Part 2":
444*** Clarke had told Bellamy that "[he] did good" with the 100 in "We Are Grounders." Kane tells him this again after the Arkers are freed.
445*** The phrase "good guys" -- in an earlier episode, Abby chides Clarke by telling to remember that they're the good guys. After Clarke's actions in this episode, she tells her mother that she tried, and Abby tells her, "Maybe there are no good guys." Said again by Clarke to Bellamy in "Demons" when he asks what to do [[AntiHero when you realize you might not be the good guy]].
446*** Bellamy tells Clarke that if she wants forgiveness for irradiating Mount Weather and killing everyone inside, he's willing to forgive her -- a direct parallel to their conversation in "Day Trip" where Clarke forgives him for indirectly causing the Culling. When Clarke refuses, she says "I bear it, so they don't have to", the same thing President Wallace said to her earlier in the episode. This phrase pops up again in Season 4, when Clarke injects herself with the Nightblood serum instead of a restrained Emori.
447** The final climactic moments of Seasons 2 and 3 both involve Clarke pulling a handle.
448** Kane's ultimatum to Abby in Season 5 to either quit taking the pills or lose him ends with the single word "Choose" - just like Octavia's message to possible enemies of Wonkru.
449* MeaningfulName:
450** Some of the names have some significant meaning.
451*** The "Ark". As in [[Literature/TheBible Noah's]] [[TheArk Ark]].
452*** The leader of the Mountain Men, who live in an ElaborateUndergroundBase, is named [[Literature/TheDivineComedy Dante]].
453*** In Myth/ClassicalMythology, Cerberus was guard dog to the Underworld. The "Cerberus Project" involves creating Reapers out of strong Grounders so that the Grounders will fear Mount Weather.
454** Episode titles also occasionally fall into this.
455*** One of the episodes is titled "Murphy's Law". Aside from things going spectacularly wrong at the camp, it also focuses somewhat on Murphy.
456*** The episode "Day Trip". Aside from two characters going on a journey, it also features everyone getting high.
457*** The episode in which Raven is [[spoiler: possessed by A.L.I.E.]] and dishes out {{The Reason You Suck Speech}}es to the cast is titled "[[Literature/TheRaven Nevermore]]".
458* MedicalHorror: The terror of the final episodes from Season 2 comes from the Mountain Men harvesting bone marrow from the 100, cutting them apart and draining them dry.
459* MeltingPotNomenclature: The Grounders have names from various sources to emphasize the rugged future, with names like Tristan (Welsh), Indra (Hindu), and Artigas (Spanish).
460* MercyKill:
461** Clarke does this for Atom after he is caught in the acid fog, after Bellamy can't bring himself to.
462** It is the general policy of the Grounders to kill any Reaper's that they manage to capture, since they know of no way to reverse what was done to them. This extends to when the Reaper was a close friend or loved one, as they consider this a mercy instead of living as Reaper.
463** Clarke kills Finn to spare him from a slow death by torture; this angers both the Grounders (who wanted to see him suffer) and Raven (who wanted to save him).
464** Octavia to [[spoiler:Ilian]] in the Final Conclave, after he's impaled through the throat by one of [[spoiler:Echo]]'s arrows and paralyzed.
465* MoodWhiplash: When Bellamy, Octavia, and two guards are scoping out the old parking garage, the guard Scott finds a wind-up music box. It plays "Carol Of The Bells", and the two guards smile and enjoy the toy when they are set upon by two Reapers. The music keeps eerily playing as Bellamy and Octavia discover the Reapers finishing the job.
466* MoralMyopia:
467** The whole conflict between the Grounders and the Sky People because both sides saw the others' actions as unjustifiable and thought the other side were the ones who started the conflict and both sides at first failed to understand that they were both just defending themselves. This is also furthered by the Grounders' culture being harsh and violent and it made making peace with them difficult as they refused to let the things the Sky People did to their people go and some of the Sky People also refused to forgive their actions against their people. This results in one or several members from both sides committing actions that either deliberately or accidentally restarts the conflict. Generally the whole conflict got started accidentally because of the 100 not knowing that people lived on Earth and that they were trespassing on their land, and therefore what they see as self-defense is viewed by the grounders as acts of aggression.
468** Debated when Finn massacres a Grounder village in his search for Clarke. Many attempts are made to justify his actions as because he "didn't know" and "meant well", but these excuses fell flat each time compared to the number of the dead. Ultimately, he surrenders to Grounder justice because there ''was'' no justification for his actions, and no amount of Us vs Them or we were at war thinking could create one. But of course the real problem wasn't just whether or not his crime was justifiable, but the way the Grounders wanted to punish him for his crime by subjecting him to a slow and painful death and even if he did deserve to die, he didn't deserve to die like that. Abby was even trying to find a compromise that would have him punished for the crime under Ark law, but the Grounders insisted that it had to be their way.
469** The Grounder and Sky People's conflict with the Mountain Men who created the Reapers and puts their people through painful experiments because both groups saw them as this great threat that needed to be stopped but they ignored the fact that the Mountain Men were doing the things they were doing to treat their people's fatal weakness to the radiation of the outside and their experiments on the 48 was an attempt to find a cure. Clarke who was leading the charge was the one who knew this because she was recently in Mount Weather before escaping and was already prepared to wipe them out to save her friends until Bellamy who is undercover on the inside tells her about the children and the faction that doesn't agree with the experiments which changes the plan to only killing the guilty party but not once does she try to find a solution that could get their people cured and get her friends out only being focused on saving her own people. Also Lexa and the other Grounders were also only focused on getting their people out which of course leads to the deal with Lexa to release her people on the condition that she retreats with her people and allows the experiments on the Sky People to continue and when she agrees she points out to Clarke that Clarke would have took the same deal if it was her people and of course Lexa's decision leads to Clarke and Bellamy wiping all of them out with the outside radiation.
470** The Mountain Men (particularly Cage, Tsing and the Mountain Guards) also are guilty of this because they could have tried to reach out to the Sky People and found a peaceful solution that could have involved doing the experiments without causing casualties but they decided not to on the grounds of not taking any chances on the possibility that they would say no and they were in a hurry because of radiation leaks in the facility potentially killing everybody in a few months and knowing that a conflict with the Sky People and the Grounders was coming.
471** Debated again in "Bitter Harvest", after Clarke has pleaded with Lexa to simply forgo war against Arkadia in order to break the [[CycleOfRevenge cycle of violence between them]]. When she still asks for vengeance against Emerson of Mount Weather, Lexa explicitly asks her if Clarke's speeches about mercy only apply to her own people and nobody else. Clarke ultimately chooses to forgo vengeance herself in order to help support the overall peace.
472* MushroomSamba: In "Day Trip" nearly everyone eats these nuts with hallucinogenic properties and starts tripping out.
473* {{Mutants}}: Present thanks to the extreme radiation post-nuclear fallout altering the genetic structure of some organisms. Their existence is established in the pilot, where the characters meet a deer with two heads. Among the Grounders, the mutants are ostracized and looked down upon being seen as bad luck and because of this they are banished to the wastelands or they are killed when they are born and sometimes their family is banished with them if they refuse to kill them.
474* TheMutiny: Diana Sidney takes over the exodus ship and sabotages the Ark after trying to kill the council.
475* MyGodWhatHaveIDone:
476** Kane's reaction when he realizes that there was no need to have 320 people kill themselves.
477** Said verbaitm by A.L.I.E's creator, Becca, when she watches from the space station as A.L.I.E causes nuclear war to cover Earth.
478** Raven, when she realizes that A.L.I.E's way of "removing the pain" means she no longer remembers the feelings she had for Finn and how much he meant to her. [[spoiler:In Season 7, to stop Sanctum's nuclear reactor from exploding, Raven sends in several convicts to effect repairs, and they all die from radiation exposure. She bitterly regrets not taking the time to come up with a non-lethal solution, especially since she ignored that EvenEvilHasLovedOnes.]]
479* MySisterIsOffLimits: In the beginning of Season 1, Bellamy tries to stop his younger sister from flirting with any of the people on the Ground, specifically Finn.
480** Bellamy also ties Atom to a tree all night for kissing her and Atom's responsibility was to look after Octavia while Bellamy was gone.
481** Bellamy at first doesn't approve of Octavia's relationship with Lincoln mostly because him being a Grounder, but he later starts to trust Lincoln with protecting her and starts to be okay with them being together.
482* TheNeedsOfTheMany: A recurring conflict -- is sacrificing a few people for the greater good of everyone else the right way to go about it?
483** Kane thinks so, and gives the go-signal for what comes to be known as "The Culling" -- 320 people killed to buy more time. He later realizes he was ''very'' wrong about this.
484** Jaha initially seemed reluctant to believe so, but states as much in "Survival of the Fittest."
485** The reason Tsing is so willing to perform unethical experiments is that continued research will help the Mountain Men return to their proper home, when they get cured of their radiation illness.
486** Clarke is adamant about protecting everybody and thus doesn't want to hand over Finn to the Grounders and pushes for the rescue of the 47 in Mount Weather despite the costs.
487* TheNeutralZone: [[PlayingWithATrope Played with in Season 3 during the conflict between the Grounders and Arkadia]]. Lexa wishes to prevent an all-out war between the two people, but cannot allow Arkadia's repeated acts of aggression to go completely unanswered, so she enacts a five-mile quarantine surrounding Arkadia. She will not allow the Grounder armies to attack the settlement, but any Arkadian who leaves the boundary will be killed.
488* NiceJobBreakingItHero:
489** Experimenting with the wristbands made every one of them short out.
490** Bellamy tells Charlotte she needs to slay her demons when she's awake in order to stop her nightmares. Later, she sees Clarke perform a MercyKill by stabbing the carotid artery. She murders Wells using the same technique she saw Clarke use, and says it's to slay her demons, given that Wells reminds her of his father, who killed both of her parents.
491** Several of the actions of the teenagers on the ground exacerbate the conflict between them and the Grounders, often on the basis of incomplete or wrong information. Most egregious is Finn failing to stop and consider any alternatives once he has his mind made up that the Grounders have kidnapped Clarke, even amid mounting evidence that they haven't.
492** Bellamy helps Pike carry out an unprovoked massacre of allied Grounders, which promptly destroys a very fragile alliance and has continuous negative effects throughout the rest of the season.
493* NoOneGetsLeftBehind: This gets repeated frequently in the series, though it is not always upheld.
494** When Jasper is attacked and then captured by the Grounders, Clarke insists on going back for her once they realize he's alive. Finn rightly points out that they're likely to lose more people saving him, but decides to help when she won't be dissuaded.
495* NoPeriodsPeriod: The lack of the 100 dealing with any menstrual cycles while stranded on the ground without any supplies is explained in Season 3: Fertility inhibitors prevent both pregnancy and menstrual cycles, and people discuss removing them at the start of this season.
496* TheNoseKnows: [[spoiler:Ontari]] is able to smell the poison on [[spoiler:Clarke's]] sleeve that she intended to use on [[spoiler:Nia]] from across the room.
497* TheNotableNumeral: The 100. It's supposed to be the number of dropped criminals, but Bellamy makes the drop as well, Raven follows soon after, and [[DwindlingParty there aren't a hundred of them anymore]].
498* NotNamedInOpeningCredits: Used to hide [[spoiler:Lexa]] and [[spoiler:Abby]]'s return in the GrandFinale.
499* NotSoDifferentRemark:
500** When the 100 learn that the Grounders are coming at them with an all-out attack, Bellamy motivates them by saying that they are Grounders as well and that they have learned to fight and survive on the ground and have as much right to be on the ground as they do. However in an attempt to prevent a battle and convince everyone to abandon the fort and try to seek shelter with Luna's clan, Clarke steps forward and says that they are not Grounders and she also say this because [[NotSoSimilar she does not want them to descend to savagery in the name of self-defense.]]
501** Abby says the line verbatim after she witnesses Lexa execute Gustus for his attempt to sabotage the Grounder/Ark alliance. Whether she meant the government's willingness to use draconian measures to enforce their authority, or the people's willingness to accept those draconian punishments to do the right thing, she did not clarify.
502** When Abby and Kane are trapped under rubble for most of "Resurrection" following Mount Weather's missile attack in the previous episode, they gradually realise that the tough choice Clarke had to make was like the life-or-death choices they had to make on the Ark. She knew the attack was coming and could have warned them, but if she had then Mount Weather would have figured out they had someone (Bellamy) inside who was working for them. She sacrificed a small number of lives for the greater victory.
503** Clarke notes the similarities of her and Abby in "Remember Me" after realizing that they would both go to extremes to keep everyone safe.
504* NotSoSimilar: After Bellamy motivates the 100 in the face of a Grounder attack by explaining [[NotSoDifferentRemark that after learning to fight and survive they are Grounders as well]], Clarke steps forward and says that they are ''not'' Grounders. She does not want them to descend to savagery in the name of self-defense and she was attempting to convince them to try and seek shelter with Luna's clan instead of fighting in a battle that they could possibly lose.
505* NuclearMutant: One of the threats of a post-nuclear-apocalypse Earth. The first animal seen is a beautiful buck grazing in the forest-and then it turns and we see it has part of a second head growing out of its first. Mutant humans are also present, often with physical deformations such as extreme syndactyly or a deformed mouth or hand.
506* OccupiersOutOfOurCountry: The very beginning of the conflict between the Grounders and the Ark stems from the Ark "invading" Grounder territory when they sent the 100 onto their land and promised more to follow.
507* OhCrap:
508** Clarke when she realizes something ''very'' important about the planet they just landed on in the pilot.
509--->'''Clarke:''' We're not alone.
510** Said word-for-word by Jasper in "Join or Die" after he and Octavia drink from the Grounders' vial...and then she passes out.
511* OohMeAccentsSlipping: Both Eliza Taylor and Alycia Debnam-Carey let their regular Australian tones peek through briefly in "Thirteen" (Taylor when Clarke says "Stop" in one scene, Debnam-Carey more noticeably when Lexa is shouting at Titus later on).
512** Also happens with Eliza [[spoiler:playing Josephine]] in Season 6. After the scene in her room, however, she seems to have it back under control.
513* OpenSecret: Maya states everyone in Mount Weather knew that the Grounders were being harvested for the sake of their blood. Only the Ark kids didn't.
514* OnceASeason: Clarke pulls a lever in a highly tense situation in the season finale.
515* OnlyOneName: All the grounders; surnames don't seem to exist among them anymore. If a longer, more specific name is needed, they’ll be identified by their clan (“Lexa kom Trikru”). Madi is the one exception to this; after being adopted by Clarke, we see her name given as Madi Griffin.
516* OnlyTheKnowledgableMayPass: According to [[AllThereInTheManual supplemental material]], the Grounder ConLang started as a series of code-words used after the initial nuclear war to distinguish who was or was not a member of their particular group. Over the following century it developed into a fully developed language which the Grounders use alongside English. It’s first used for this purpose in Season 5, with Bellamy and Echo speaking Trig so that the Eligius crew can’t understand what they’re talking about.
517* ParentheticalSwearing: "Float" (The term for an execution by [[ThrownOutTheAirlock spacing]], which has become a catch-all term for "kill") is often used in the place the the 'f'-word for swearing.
518-->'''Clarke:''' Go '''''float''''' yourself!
519* PeaceConference: Finn tries to organize one between the Grounders and The 100 to prevent violence from escalating once people from the Ark arrive. Both sides brought weapons as a matter of security, and Jasper believed that the Grounders were planning an attack and shot first, putting the two sides officialy at war.
520* PeacefulInDeath:
521** It is general Grounder tradition to [[InvokedTrope bid farewell at death with "Your fight is over"]], recognizing that the deceased are finished with the hardships and struggles of the world. Whether the specific dying person peacefully ''accepts'' these wishes varies depending on the circumstances.
522** As she lies dying, [[spoiler:Lexa]] speaks the phrase "''My'' fight is over" (Emphasis added) to show that she is accepting of what is happening.
523** [[spoiler:Clarke]] also uses the first-person variant when she has to do a time-consuming HeroicSacrifice, which would leave her no time to get back to safety. However, she actually survives, though everyone else believes she died.
524* PlatonicLifePartners: Lead characters Clarke and Bellamy form a balanced partnership in Season 1 that is as often deepened as it is strained by the events of the show. While they both have multiple love interests, their relationship is often front and center, they frequently forgive and support each other, and both consistently admit that the other is hugely important to them, to the point that they are occasionally implied to be each other's LivingEmotionalCrutch. Despite all this they don't get romantic, although there are quite a few ShipTease moments.
525* PlotArmor:
526** In the S1 finale when it's decided the entire Ark would be sent down to the ground, but it was likely only one section of the station would survive. Naturally, it's the only section with named characters. (Though in Season 3 we find that one more did survive, though was too deep in Ice Nation territory to be found at first.)
527** The Mount Weather missile attack doesn't manage to kill any of the named characters.
528** Jaha's band of followers dwindles over the course of Season 2, leaving just him and the ''other'' major character in it, Murphy, alive.
529* PopulationControl: By the Ark's laws, people are only allowed to have one child, the medical resources allowed for saving a single life are strictly limited (even for the Chancellor), and even minor criminals over eighteen are executed instead of imprisoned to conserve resources. Being an illegal child is just as illegal as having one. If the population is still too high to be sustained, then even innocent people can be executed. Add in the occasional engineered “accidents” to cull the population, and you have a pretty awful place to live.
530* ThePromisedLand: The City of Light, a supposed utopia for all outcasts. No one is really sure if it even exists, and the road towards it is dangerous.
531* ProtagonistJourneyToVillain: Played with to hell and back, combined with RedemptionQuest and HeelFaceTurn. Basically each major character who starts as an antagonist will become heroic, while the heroic characters become more villainous. Then they switch places and start the cycle over again. In short:
532** Clarke starts off as a classical hero, and slowly starts making more questionable decisions until the climax of Season 2 when she and Bellamy intentionally commit genocide. She spends most of Season 3 trying to atone for it, only to become a crazed MamaBear in Season 5.
533** Finn starts off as the OnlySaneMan but gradually becomes more unhinged in Season 2.
534** Octavia starts off as innocent and trusting, but by Season 5 she has become a KnightTemplar after playing a ZeroApprovalGambit for her people's survival.
535** Miller starts off quite rational and kind hearted. He becomes a full on BloodKnight with a fanatical devotion to Octavia by Season 5, though he regrets it by the next season.
536** Bellamy starts out villainous, gets better by Season 2, regresses to murderous levels in the first half of Season 3, then spends the latter half of Season 3 atoning.
537** Jaha starts off as a ReasonableAuthorityFigure in Season 1, to a DarkMessiah in Season 2 and 3, with a dose of BrainwashedAndCrazy, and spends Season 4 atoning.
538** It gets to the point in Season 5 that most of the characters can't tell where they fall anymore, and Bellamy of all people has become TheHero. And to really drive home this trope, Bellamy ends up [[spoiler:dying as a villain in Season 7]].
539* PsychoSerum: The Mountain Men turn strong Grounders into the psychotic, murderous Reapers by injecting them with such a drug. They become so addicted to it that they're willing to kill others in order for another dosage.
540* PunnyName: Some of the episode titles. 'Inclement Weather' and 'Day Trip' stand out.
541* RaceAgainstTheClock: Raven and Sinclair have to race to get the code to defuse the bomb placed in Mount Weather. [[DownerEnding They fail]].
542* RaceLift: Implied as much; in the books, Wells is half-brother to the Blake siblings, but this is unlikely in the show given the actors' ethnicities [[note]] Creator/EliGoree (Wells) is black, Creator/BobMorley (Bellamy) is half-white, half-Filipino, and Creator/MarieAvgeropoulos (Octavia) is white[[/note]].
543* TheRadioDiesFirst: Happens when the dropship crashlands on Earth. As a result, the 100 cannot communicate with the adults on the Ark, with their wristbands the only sign they're alive. Too bad Bellamy starts convincing them to cut them off...
544* RaisedAsAHost: The people of Sanctum are raised to worship the Primes, and anyone with black blood is taught that it's an honor to give up their body so that a Prime can live again.
545* TheReasonYouSuckSpeech:
546** President Wallace, the former leader of the Mountain Men, gives one of these to his son ([[TheUsurper Who has taken over Mount Weather]] and kept his dad confined). While it doesn't happen quite that way, the ex-President turns out to be right.
547--->'''Dante''': You've killed us. One week in office, and you've managed to turn neighbor against neighbor, you've made the outsiders hate us more than they already did, you lost our outer defenses, and now a door that hasn't been breached in 97 years is going to fall, and an army of savages is going to flood these halls, killing every last one of us.
548** Raven deals out {{Breaking Speech}}es in this form in "Nevermore" while BrainwashedAndCrazy, calling out Clarke and Bellamy for all the deaths they've caused and Jasper for being incapable of moving on.
549** Clarke receives a ''lot'' of these in early Season 6, regarding her betrayals in the last season.
550--->'''Raven:''' Every time you do something horrible, you say you're sorry. And then you do it again. [[SarcasmMode Clarke Griffin, and her Impossible Choices.]] At least have the balls to stand by them!
551* ReasonableAuthorityFigure: Jaha and Kane for the Ark Survivors, and the president for the Mountain Men. Although Jaha quickly moves away from this.
552* RecycledInSpace: The show starts as ''Literature/LordOfTheFlies'' AFTER THE END! AND COED! Though it quickly moves away from this premise.
553** In Season 6, the show does this ''with itself'', sending the characters off to an alien planet where society has more than a few similarities to the Grounder and Mount Weather conflicts.
554* RedBaron:
555** As a consequence of the events of Season 2, the Grounders take to calling Clarke "Wanheda", which means "The Commander of Death". Another epithet that she gains is "Mountain Slayer".
556** In Season 4, the Grounders begin calling Octavia "Skairipa", meaning "Death from above", because of her growing infamy as a killer. By the next season, she's moved on to [[spoiler:"Blodreina", meaning "red queen", as leader of the bloodthirsty Wonkru]].
557* RedemptionRejection: When Murphy returned from his exile, he seemed to be on the path of redeeming his character, with some even accepting him back, but then he decides to go on a revenge killing spree instead. He gets better, thankfully.
558* RelationshipUpgrade: Though their feelings for each other are apparent, Clarke and Lexa's actions throughout the second season and the beginning of the third are driven by the needs of their people, and they are thrown together and driven apart by circumstance and their own conflicting goals. In "Thirteen", they finally both admit their feelings for each other irrespective of the needs of their people. [[spoiler:[[DownerEnding Lexa is killed following their love scene]].]]
559* RememberTheNewGuy: Season 3 introduces a few new characters in the time skip, whom the core cast are already familiar with as friends or family from back on the Ark.
560* TheRemnant: The Mountain Men have been revealed as one for the U.S. Government/Military, based out of Mount Weather.
561* ReunionVow: "May we meet again" is an excerpt from the traditional funeral rites of the Ark. Characters occasionally use it as a farewell when they are unsure that they will reunite.
562* RevengeBeforeReason:
563** After Murphy regains the trust of the 100, he ruins it all by going on a revenge spree against the people who wronged him. He convinced himself that he would become the leader after killing Bellamy; his plan goes less than spectacularly.
564** When the Ark and the Grounders are preparing for their final attack on Mount Weather, Clarke is worried that in their rage the Grounders might decide to slaughter the entire population when given the opportunity, including even the children and the people who have actively aided them. [[InvertedTrope The Grounders actually strike a deal with Mount Weather and abandon the Ark to face them alone]].
565** A desire for revenge for Azgeda's attack on the settlement at Mount Weather leads to Bellamy joining Pike in his campaign against any and all Grounders, which ultimately results in [[spoiler: Lincoln's execution by Pike]].
566** [[spoiler: Lincoln's execution by Pike (and indirectly caused by Bellamy)]] causes Octavia to beat the crap out of Bellamy, blatantly murder [[spoiler: Pike]], and then become a remorseless killing machine for a while, which earns her the nickname "death from above" from the Grounders.
567* RousseauWasRight: One of the themes of the show is that many of the "villains" are basically good people stuck in [[CrapsackWorld wretched situations]] and forced to make tough decisions. Listing them:
568** Bellamy shot Jaha so he could come to Earth and look after his sister Octavia, and while he does put innocent lives at risk in an effort to save himself he also looks out for The 100 and tries to keep them alive.
569** Jaha has had a lot of people executed and he risked The 100's lives sending them to Earth, but it was all in the name of ensuring humanity's survival. Also, he's a ReasonableAuthorityFigure who tries to avoid unnecessary killing.
570** Kane plays a big role in the execution of 320 innocent Ark residents, but he's a WellIntentionedExtremist trying to keep the human race alive. The realization that the aforementioned execution was unnecessary is a huge MyGodWhatHaveIDone moment for him.
571** The Grounders attacked and killed members of The 100, but it was because they believed that The 100 were invaders, a belief that was "confirmed" in their minds when the flares that The 100 used to signal The Ark came back to the surface and burned down a Grounder village.
572* RoyalBlood: Some Grounders have [[AlienBlood black blood]], for which they are termed "Nightbloods". Grounder tradition has the Nightbloods identified as potential successors to the Commander, and one of them will arise to the position with the death of the current Commander. [[spoiler:It's later revealed to be the result of a serum to boost radiation resistance, which was originally designed for miners on extra-solar missions. Becca came to the ground intending to inject as many people as possible with the serum.]]
573** Also found on Sanctum, where black blood marks someone as a "host" that a Prime can be reborn in.
574* SanitySlippage: Ooh boy, the setting is not good for mental health. Clarke, Jaha, and Finn all struggle with it in Season 2. Murphy has a hard time after being alone for 80 days in the third season. Season 5 shows Octavia, and to a lesser extent all of Wonkru, becoming pretty crazed.
575* SceneryPorn: Earth looks pretty damn good for a planet that was devastated by nuclear war, and the series isn't shy about showing off the awesome scenery.
576* TheScream: Used in "Demons" with Harper's scream bleeding into the intro credits.
577* ScrewTheRulesIMakeThem: Jaha pardons Abby and later tells Kane that knowing when not to follow the law is an important part of being Chancellor. Given he has spaced people for doing things like this in the past it seems that you should know not to follow the law if it's his life that was saved.
578* ScrewTheRulesImDoingWhatsRight: To do so risks becoming a HeroicSacrifice under [[AllCrimesAreEqual the Ark's laws]], but a near-certain death sentence doesn't stop Abby from using as much blood as necessary to save Chancellor Jaha's life.
579* SecretTestOfCharacter: Gustus, [[ActuallyThatsMyAssistant posing as the Grounder Commander]], locks Kane and Jaha in a cell with a Grounder slave woman and explains that [[InvoluntaryBattleToTheDeath they must fight to the death]], with the survivor allowed to offer him the Ark's offer of surrender. The slave woman is actually Lexa, who wished to see how Kane and Jaha would react and whether or not their professed desire for peace was genuine.
580* SelfHarm: After [[spoiler:A.L.I.E. possesses Raven]], she has her host make deep gashes on their arms.
581* SentIntoHiding: Because the Ark enforced a strict [[PopulationControl one-child policy]], with violations resulting in execution, Bellamy and his mother kept his illegal little sister Octavia hidden under the floor the entire time she was growing up. When she was found out, she was thrown into lockup, her brother was demoted to janitor, and their mother was ThrownOutTheAirlock.
582* SequelEscalation: The stakes get higher with every season. While Season 1 focuses on the delinquents dealing with a few Trikru authorities, Season 3 features an interclan war, Season 4 is about the cast trying to survive ''yet another apocalypse'', and the end of Season 7 is about [[spoiler: a SufficientlyAdvancedAlien race that wants to perform a Judgment Day to determine if humanity will "transcend"]].
583* SexForServices: Seems to be a common (though illegal) way to trade for favors with what limited resources they have on the Ark.
584** Bellamy's mother did this so she knew when to hide Octavia, as well as to secure Bellamy a spot on the Guard.
585** Suggested of Raven when she needs a part to complete an [[EscapePod illegal space lifeboat.]]
586---> '''Nygel:''' I owe a favor to the chief of electrical, and he's got a thing for tough, pretty girls like you.
587* SexForSolace:
588** After being confronted with Clarke and Finn's relationship, Raven sleeps with Bellamy to take her mind off Finn and Clarke being out together. She admits afterward that it didn't work.
589** In the beginning of Season 3, Clarke sleeps with Niylah as part of her ongoing efforts to cope with her guilt
590and despair over the end of Season 2.
591* SexSignalsDeath: [[spoiler:Lexa is killed]] in the scene immediately following her sex scene with Clarke.
592* ShootTheHostage: Near the end of the second season, Lincoln is held hostage by a Mountain Men sniper. It's a sign of how far Clarke's gone from her AllLovingHero beginnings that she simply shoots at the sniper's center mass through Lincoln's shoulder. Lincoln just [[ProudWarriorRaceGuy congratulates her on her good aim]] and [[JustAFleshWound goes to get patched up.]]
593* ShootTheMessenger: When a pair of Grounders are sent to Arkadia to inform them of the blockade that encircles the settlement, they explain that the blockade will be lifted if Arkadia turns Pike over to them for punishment for his actions. After Pike refuses, Bellamy shoots both Grounders when they warned him to do what was right for his people.
594* ShoutOut:
595** In the season finale, one of the delinquents shout "[[Film/{{Aliens}} Game over, man!]]"
596** Ricky Whittle's character was only known as Grounder until he revealed his name to be Lincoln, which so happened to be the name of the character he played on an episode of [[Series/{{NCIS}} NCIS]] in 2013.
597** [[RoboCam The HUD]] of ALIE's drones is almost identical to the various terminators' HUD in ''Series/TerminatorTheSarahConnorChronicles''.
598** In 7x09, after agreeing to help Indra and Murphy on his own terms, Sheidheda says: "I think this is the beginning of a beautiful friendship", a quote from '' Film/{{Casablanca}} ''.
599** The entire [[spoiler:BodyBackupDrive story arc about the Primes]] from Season 5 onwards seems directly inspired by the ''Literature/AlteredCarbon'' novels, only with less {{Cyberpunk}}.
600* ShroudedInMyth: A mere three months after the final battle at Mount Weather is all it takes to turn Clarke into a fearsome boogeyman among the Grounder tribes, known as ''"the Commander of Death"''.
601* SignsOfDisrepair:
602** Polis got its name from the damaged lettering on the side of [[spoiler: Becca's escape pod]], which originally spelled out 'Pol[[spoiler:ar]]is'.
603** This is presumably how [[UsefulNotes/{{WashingtonDC}} Tondc]] got its name as well.
604* SinsOfOurFathers: Wells catches a lot of flak because people hate his father for enforcing the Ark's draconian laws. It gets him killed in the third episode, when Charlotte murders him because of nightmares about his father and Wells reminding her of him.
605* SlidingScaleOfIdealismVersusCynicism:
606** The series proper is started with the discovery that the Ark's life support is failing, and a large number of its people need to be removed from the population in order to extend their existing air for long enough to repair the system. The Council believes that the population cannot be told of this information since it would lead to panic and unrest, while some of its members believe that the people deserve to know regardless. The Council's original plan was to have an "accident" to buy themselves the necessary time, but when the population does learn of this news, instead of rioting enough people volunteer to be culled in order to ensure the survival of their loved ones.
607** Generally speaking, although the show does have its share of idealistic events, it's mostly relentlessly cynical. Mankind as a whole is consistently portrayed as violent, vindictive, cruel and unable (or unwilling) to learn from past mistakes. The heroes grow progressively darker in their morals as the CrapsackWorld they live in keeps battering down their ideals. People die in droves, often entirely pointlessly, and any small flame of hope that dares to flicker on occasion is quickly extinguished by more violence, death and suffering. By the end of the final season, [[spoiler:the human race is down to less than a thousand specimen that avoid total extinction only by the skin of their teeth, while still deep in the process of wiping each other out.]]
608* SoProudOfYou: When Indra said that Octavia had become part of the Trikru, Octavia's eyes glowed with the first acceptance she had ever known in her life.
609* SpeculativeFictionLGBT: It's mentioned that the Grounders don't particularly care about sexuality in a world that has become so focused on survival, allowing this trope. Among others, there's Clarke (bisexual), Lexa (lesbian), and Miller (gay).
610* SpitefulSpit: When Clarke and Lexa come face-to-face for the first time in the third season, Clarke spits at Lexa and has to be dragged out of the room ranting threats. Lexa is visibly hurt, as she had hoped for a better reunion.
611* {{Sting}}: The tension of most dramatic revelations in the series are underscored by the [[https://www.youtube.com/watch?v=8hP9D6kZseM Inception-style]] ''BWAAAAA'' horn.
612* SuperBreedingProgram: The original plan that Mount Weather had for the 49 kids were to insert them into the gene pool.
613** Josephine devised a eugenics program to ensure the continued birth of Nightbloods in Sanctum, but treating their people like cattle this way [[EvenEvilHasStandards was rejected even by the other Primes]].
614* SuspiciouslySimilarSubstitute:
615** Lexa to Anya. She is introduced after Anya's death and takes her place as the Grounder leader that Clarke and the others are trying to reason with. They are also both stoics who are capable of wiping out Skaikru if they are seen as a threat. Justified, as Anya was mentioned to be the one who trained and mentored Lexa.
616** Subverted with Luna who [[spoiler: is introduced after Lexa's death]]. Although she and Lexa are both stoic female leaders who care greatly about their people and have a soft spot for children, Luna's pacifism makes her completely different from Lexa who was capable of great violence when it comes down to it. [[spoiler:Also seen in their deaths. Lexa died trying to bring about peace between the Grounders and the Arkadians, while Luna died a StrawNihilist trying to end humanity's last chance of survival.]]
617[[/folder]]
618
619[[folder:T-Z]]
620* TakeAThirdOption: Given the deciding vote on whether to "cull" 300 innocent citizens to buy time to save the Ark, Chancellor Jaha chooses to abstain so the resulting tie will force a revote in ten days, giving Abby until then to prove the Earth is habitable or they will have to kill them.
621* TakeBackYourGift: Raven returns the pendant Finn made for her when she finds out that he is in love with Clarke.
622* TakeCareOfTheKids: Abby asks her friend Callie to watch over Clarke for her when she thinks she's about to be executed.
623* TakingTheHeat:
624** Wells is revealed to have been doing this for Abby, when he takes the blame for being the one who turned in Clarke's father which led to him getting floated to spare Clarke the pain of knowing it was her own mother who did it.
625** Finn took the blame for Raven's illegal spacewalk, because he (as a juvenile) would only be imprisoned while Raven (as an adult) would have been [[ThrownOutTheAirlock floated]].
626* TalkingInYourDreams: Lexa believes that the previous Commanders speak to her in her dreams. [[spoiler:It turns out they really were talking to her through the A.L.I.E 2.0 chip/The Flame.]]
627* TeensAreMonsters: Too much freedom leads to the kids going a little wild. Then they found themselves against the Grounders.
628* TeenageWasteland: And how! The 100 consist of [[ExactlyWhatItSaysOnTheTin a hundred]] teenage juvenile offenders sent down to Earth's surface with absolutely no adult supervision. There was supposed to be a guard, but he was replaced by Bellamy, who is only a few years older. It takes them less than ten minutes to start taking off the wristbands that are monitoring their vital signs and less than a day to declare that their new motto is "Whatever the hell we want, whenever the hell we want." This doesn't last all that long, though -- they are forced to get more organized and disciplined as the harsh realities of survival make themselves known.
629* TeethClenchedTeamwork:
630** In the early episodes, any collaboration with Clarke and Bellamy. They outright disliked each other then, but were willing to put the rest of the 100 above that. Later, it grows into genuine teamwork.
631** The alliance between the Grounders and the survivors of the Ark. There's rampant mistrust on both sides, but both want to take down the Mountain Men.
632** A constant component of any pairing when someone has to work with Murphy.
633** Octavia and Diyoza when they hunt for Gabriel, after spending the last season leading their peoples to war. Though, after the events of Season 5, ''anyone'' working with Octavia does so with teeth clenched, and her partnership with Diyoza is actually pretty friendly compared to the others.
634* ThemeNaming:
635** Some of the teenagers are named after famous science fiction writers:
636*** Clarke: Creator/ArthurCClarke.
637*** Wells: Creator/HGWells.
638*** Octavia: Creator/OctaviaButler.
639*** Bellamy: [[Literature/LookingBackward Edward Bellamy]].
640*** Miller: [[Literature/ACanticleForLeibowitz Walter M. Miller]].
641** Grounders have geographically themed names.
642*** Trikru - Settled around the ruins of Washington D.C.
643*** Lincoln's village was built around the Lincoln memorial.
644*** Lexa was named after Alexandria, VA which is located on the other side of the Potomac River from D.C.
645*** Costia, Lexa's former lover, is derived from Anacostia, either the neighborhood in Washington D.C. or the river.
646*** Other Trikru members include Tomac (after the Potomac River), Delano (after the Franklin Delano Roosevelt Memorial in Washington), and Penn (after Pennsylvania Avenue).
647*** Azgeda
648*** Queen Nia of the Ice Nation is named after Niagra Falls which is in the Ice Nation's territory.
649*** Ontari is short for Ontario.
650*** Supervising producer and writer Aaron Ginsburg named Emori and Otan after the DC War Memorial and the DC Botanical Gardens respectively.
651* ThereAreNoTherapists: Thus, nobody's around to help the cast with their increasing [=PTSD=].
652** Jasper suffers from PTSD caused by a near-death experience and is unable to get help due to the only medical professional having no knowledge of treating mental illnesses. He then spirals into depression following [[spoiler: Maya's death at Mount Weather]] which eventually culminates in [[spoiler: him committing suicide rather than try to survive Praimfaya]].
653** Finn suffers from PTSD as well, and without being able to get help he subsequently gets sentenced to death for his crimes relating to his mental illness.
654** Bellamy is implied to have kept the trauma he underwent in Mount Weather mostly to himself in the TimeSkip between Seasons 2 and 3. This coupled with [[spoiler: several Skaikru deaths in Mount Weather, including that of his girlfriend Gina]], and Clarke's perceived betrayal by allying with Lexa, causes him to [[AntiVillain support Pike]], which, in turn leads to a huge MyGodWhatHaveIDone moment. By Season 4, he doesn't think [[spoiler: that he deserves to be one of the people who deserves to be in the ship when the radiation comes and has a desperate desire to redeem himself before the end comes.]]
655** [[spoiler: Lincoln's death]] triggers a RoaringRampageOfRevenge from Octavia, who claims that she died [[spoiler: when Lincoln did.]] It culminates in her very nearly walking into the black rain just to end her pain.
656** Clarke is haunted by the increasingly horrifying things she does to protect her people, and she goes a bit nuts when this tendency comes into conflict with her newfound MamaBear instincts for Madi. By Season 6, she's nearly convinced that everyone would be better off without her, and is nearly DrivenToSuicide on three separate occasions.
657** Subverted in Season 7, in which Jackson (normally a medical doctor) starts acting as a therapist for Madi.
658* ThirdLineSomeWaiting:
659** The back half of Season 2 alternates between the Mount Weather crew and the rest of the Sky People trying to find a way to save them, but adds Jaha and Murphy's quest for the City of Light to the mix. It's geographically removed (as it's them trekking across unfamiliar terrain) and has little in common with the other two plots...until the Season 2 [[TheStinger stinger]].
660** Season 3 begins with Clarke trying to negotiate peace in Polis; Bellamy, Kane, Abby at Arkadia dealing with Pike's politicking, and Jaha's own City of Light related plot.
661* ThisIsForEmphasisBitch:
662-->'''Octavia''': "We're back, bitches!"
663* ThousandYardStare: Clarke, a few times in the episode that comes right after [[spoiler: killing Finn]] due to guilt and stress.
664* ThrownOutTheAirlock: "Floating," the preferred form of execution, consists of putting a person into an airlock and ejecting them from the outer door.
665* TimeSkip:
666** Season 3 starts precisely 84 days after the events of the Season 2 finale.
667** Season 4 ends by going forward [[spoiler:six years and seven days.]]
668** The end of Season 5 jumps [[spoiler:a hundred and twenty-five years, albeit in cryosleep]].
669* TitleByNumber: Though they are also referred to as "The 100" in-story.
670* TitleDrop: 'The 100' is mentioned on a regular basis. Some of the episode titles too, e.g. 'We Are Grounders' being part of Bellamy's speech in said episode.
671* TooDumbToLive: Let's just say it's easy to see why Jaha considers most of the Hundred expendable. Frequently Clarke or Wells pointing out what they need to do merits nothing but contempt from the rest of the Hundred.
672* TortureAlwaysWorks: Averted twice, the series seems to stick with the real-life conclusion that torture is an ineffective means of information extraction.
673** Lincoln did not reveal the poison antidote when the 100 were torturing him, it was only when Octavia poisoned herself that he gave the information to save her life.
674** Finn tortures a Grounder for Clarke's whereabouts, and the Grounder gives them a trail leading to a Grounder village. He had had absolutely no knowledge of Clarke at all, and had sent them to the village because he had a personal grudge against its inhabitants and hoped Finn would serve as his revenge.
675* TrashTheSet:
676** The Season 1 finale sees both regular sets utterly destroyed: The Ark is brought down, and the Hundred's camp is thoroughly incinerated.
677** [[spoiler:Mount Weather gets blown up early in Season 3.]]
678** By the end of Season 4, [[spoiler:both Arkadia and Polis are destroyed by Praimfaya. The rest of the world is presumed to be in a similar state.]]
679* TragicMonster: The cannibalistic and savage Reapers turn out to be a whole tribe of these. Season 2 reveals that they are former Grounder captives, who due to being physically fit were turned into WarriorSlaves by Mount Weather experiments to be used as both weapons, hunters and gatherers against their will.
680* TrialByCombat: At the start of Season 3, Lexa's position as Grounder Commander is tenuous due to her perceived weakness. Nia, Queen of the Ice Nation, challenges her authority, naming her son Roan as her champion. Lexa also has the legal right to a champion, but since the underlying point is that her strength is in question she chooses to face the challenge herself. [[AuthorityEqualsAsskicking She wins]].
681* TroubledButCute: Just about every teenage male shown-it comes with the territory of being a juvenile offender in a dystopian future.
682* TwoLinesNoWaiting: The first season alternates between the 100 trying to survive on the ground and the adults on the Ark trying to survive in space.
683* TyrantTakesTheHelm:
684** Marcus Kane starts the series as next in line for the position of Chancellor on the Ark, and when it looks as though he will succeed Jaha Abby fears he would be disastrous for the people. However, [[SubvertedTrope despite several near-deaths on Jaha's part, Kane never succeeds him during the first season]]. [[DeconstructedTrope By the time Kane does become Chancellor in Season 2 he has undergone enough character development where he is no longer even a potential Tyrant.]]
685** Charles Pike came down to Earth from Farm Station, which landed away from the location of Camp Jaha and never took part in the Ark/Grounder truce of the second season. He has a fanatical hatred of Grounders and believes that coexistence is impossible, and is nominated for Chancellor after trying to carry out a preemptive strike on a Grounder army that Lexa had sent to protect Arkadia. [[spoiler:He wins the election and is appointed Chancellor, and immediately orders the launch of a preemptive strike]].
686* UndergroundCity: The Mountain Men live in a military base underneath a mountain converted to something of this sort.
687* UnkemptBeauty: Pretty much everyone on the show since they're mainly in survival mode.
688* ViolentlyProtectiveGirlfriend: Lexa towards [[spoiler: Clarke]] when anybody threatens her or tries to take her away from her.
689* VillainHasAPoint: In Season 3, Clarke and Bellamy are arguing about the oncoming war between Arkadia and the Grounders. During the argument, Bellamy points out the moral and practical errors that Clarke had made which lead them to that point. Instead of countering the argument, Clarke can only apologize in tears, because she has also made mistakes.
690* WeakenedByTheLight: The outside world in general but ''especially'' sunlight is a death sentence for the Mountain Men since they've lost their ability to metabolize radiation after a hundred years of living underground.
691* WeHaveWaysOfMakingYouTalk: Said by Bellamy when they needed the antidote from the Grounder. The only one he gives it up to is Octavia, when she takes the poison herself.
692* WhamEpisode:
693** "We Are Grounders": The Ark falls to the Earth, uniting the political plotlines of the adults with the survival story of the 100, and the Mountain Men are introduced to the story as a new adversary even more dangerous than the Grounders.
694** "Spacewalker": Finn surrenders to Grounder justice, and the rest of the Ark survivors allow his execution in order to solidify peace between themselves and the Grounders. Clarke herself performs a MercyKill to spare him a drawn-out death by torture, and allows it in order to unite the two people against the looming threat of Mount Weather.
695** "Blood Must Have Blood": [[spoiler: The Grounders betray the Sky People in the conflict with Mount Weather, ultimately forcing Clarke and Bellamy to irradiate Mount Weather and kill off its population. Jaha and Murphy discover the City of Light, only to stumble upon the [=AI=] that ended the world the first time.]]
696** "Thirteen": Murphy realizes that the city of Polis was founded by [[spoiler: members of the thirteenth space station, ''Polaris'']], and the audience is shown the events via flashback. Lexa [[spoiler:is [[AccidentalMurder accidentally fatally shot by Titus as he tried to kill Clarke]]]], and it is revealed that the Spirit of the Commander which the Grounders have spoken of is actually an AI which is transferred from one Commander to the next and was programmed to help rebuild the world after the nuclear war.
697** "Perverse Instantiation, Part 2": It is revealed by ALIE that [[spoiler: the nuclear plants are going to melt down in 6 months and kill all life on Earth-even the people who are immune to radiation]]. She saw putting people in the City of Light as a way of trying to save humanity. Also, Octavia [[spoiler: kills Pike.]]
698** "Die All, Die Merrily": Octavia manages to win [[spoiler: the 13-clan Conclave against incredible odds (including the deaths of Roan and Luna), and gives a stirring speech proclaiming unity in which all clans will be allowed equal shares of people in the bunker underneath the tower in Polis]], only for a last-minute reveal to show that Clarke and Jaha decided to [[spoiler: pre-emptively seize the bunker for the Arkers/Skaikru only.]]
699** "Praimfaya": Clarke and a Nightblood child named Madi are [[spoiler:seemingly the only humans left on Earth. Then a ''ship'' from a penal colony in the asteroid belt lands on Earth...]]
700** "How We Get To Peace": Clarke and Bellamy murder Kara Cooper to sabotage [[spoiler:Octavia's war plans, but Octavia had kept her real plans a secret and they were unaffected by the act. Octavia arrests Clarke and intends to have her executed, so Bellamy drugs her, possibly fatally, while muffling her cries for help. He repeats his mantra of, "My sister, my responsibility," with the new meaning of protecting everyone else ''from'' Octavia, and his actions likely irreversibly sever the Blake sibling's relationship.]]
701** "Damocles, Part 2". [=McCreary=] launches the ''Damocles'', [[spoiler:destroying Earth. The surviving characters are launched into space and put into cryosleep. Clarke and Bellamy are awakened 125 years later, with Monty's video logs explaining that he and Harper didn't go into cryo, and instead lived the rest of their lives on the ship. And the kicker? Monty reveals Eligius's other objective: finding a new habitable planet. They succeeded, and ''the ship's already at said planet'']].
702** "The Face Behind the Glass". [[spoiler:Clarke is given a DeathOfPersonality, her mind erased so that one of the Primes can [[BodySnatcher take over her body]].]]
703* WhatHappenedToTheMouse: The first season featured quite a number of mutants, both human and animal alike. A two headed deer featured prominently in promotional material. By Season 3, they virtually never appear in any capacity, aside from Emori.
704* WhatTheHellHero:
705** Bellamy calls Clarke out for not keeping her mouth shut about the knowledge of Wells' killer, as this ultimately led to Charlotte's suicide.
706** When Clarke meets with the leader of the Grounders to try and arrange a peace treaty, the Grounder rightly points out that some of the 100's actions could be construed as acts of war (such as capturing and torturing Lincoln). We also learn that the flares used to signal the Ark burned down a Grounder encampment.
707** Clarke and Bellamy deliver a joint one to Abigail for [[spoiler: abandoning Finn and Murphy after they went out to rescue Clarke]] and [[spoiler: killing off Anya, the only Grounder willing to work for peace between the two sides.]]
708** Clarke to Finn after he, usually the pacifist of the group, snaps and slaughters a large number of innocent villagers. Everyone else is clearly thinking it as well, but don't come out and say anything.
709** Raven to Clarke after Finn is mercy-killed. This is mostly due to Raven's grief, as she later realises there was no other way.
710* WishUponAShootingStar: Mentioned in "Twilight's Last Gleaming" when the youths on Earth send out signal flares to let the Ark know they're alive.
711-->'''Clarke:''' Can you wish on this kind of shooting star?\
712'''Bellamy:''' I wouldn't even know what to wish for.
713* WorldOfSnark: With a good chunck of the characters being teenagers, this is pretty much a given.
714* WorstAid: The show flip-flops on this. There are episodes where attention is drawn to the correct treatment of various injuries (e.g. leaving a knife in the wound until proper care is available) since Abigail is TheMedic and Clarke studied under her. In other episodes, they happily transfuse blood of unknown donors and recipients, push arrows through wounds and so on.
715[[/folder]]

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