* AlternativeCharacterInterpretation: Is [[Franchise/TheSlenderManMythos the Slender Man]] as [[HumanoidAbomination monsterous]] as he usually is, or was he actually on the good guys' side? The ending gives support towards the latter, as [[spoiler:he waves to the heroes from the shadows.]]
* BaseBreaker: The inclusion of [[Franchise/TheSlenderManMythos the Slender Man]] in "Black Rain" has raised a few eyebrows.
* BigLippedAlligatorMoment: The duo grabbing hats and canes for a brief (as in ''ten seconds'') dance in "The Photo Man".
* FunnyAneurysmMoment:
** Calvin, having an irrational panic attack in the 2009 episode "Invasion", claims that "Japan is going to fall into the ocean!" Two years later, a massive tsunami wrecked the country.
** On a less serious note, the same episode has a brief bit [[LampshadeHanging lampshading]] the fact that [[NotAllowedToGrowUp Calvin has stayed six for a long time]], with the MTM remarking that the writers would "think of something soon", since it was a sci-fi show. Much later, in ''Fanfic/TheCollective'', [[spoiler:it's revealed that the floating timeline was the influence of the Chill Collective]].
* SugarWiki/FunnyMoments: [[Funny/CalvinAndHobbesTheSeries An entire page full of it.]]
* GeniusBonus: Among the topics discussed and/or mentioned in "Roughin' It" include [[http://en.wikipedia.org/wiki/Squat_lobster squat lobsters]] that perform [[http://en.wikipedia.org/wiki/Chemosynthesis chemosynthesis]], as well as [[http://en.wikipedia.org/wiki/Acromegaly acromegaly.]]
** Then there's "[=SouthWest=] Pacific", which is about Calvin performing in a school play. What does the title mean, then? Well, during UsefulNotes/WorldWarII there was an [[http://en.wikipedia.org/wiki/South_West_Pacific_theatre_of_World_War_II area]] entitled South West Pacific, where many important things happened. The wartime definition for this? A ''theater''.
*** Not mentioning the musical ''Theatre/SouthPacific''.
* GrowingTheBeard: Starts out as RougeAnglesOfSatin and [[TitleTheAdaptation Plagiarism: The Fan Fic]] before finding an identity of its own by Season 2 and ''really'' starts getting better in Season 3 and beyond.
* HilariousInHindsight: You know how Rupert and Earl's GoldfishPoopGang love [[AlienLunch peanut butter milkshakes]]? [[http://m.dennys.com/en/menu/item/810 Well...]]
** Calvin calls HarleyQuinn [[Webcomic/{{Homestuck}} "Hardly Quinn".]]
** Dr. Brainstorm's original design had him with [[FishEyes unfocused]] gold eyes, like a certain [[WesternAnimation/MyLittlePonyFriendshipIsMagic muffin-lover...]]
** The film ''Free Birds'' has the same premise as "Calvin, Hobbes, and the Pilgrims".
** Two for "Wild Movie":
*** One of Calvin's ideas for a movie is ''Tornado Sharks'', which is almost ''exactly'' what the 2013 MadeForTVMovie ''[[http://en.wikipedia.org/wiki/Sharknado Sharknado]]'' is about.
*** Also, the sequel's name, as proposed by Calvin, is ''Tornado Sharks 2: I Think Things Just Got a Little Windier''. The sequel to ''Sharknado'' [[http://www.cnn.com/2013/08/08/showbiz/movies/sharknado-sequel-title-ew/index.html will be named]] the equally stupid ''Sharknado 2: The Second One''.
* {{Irony}}: For all that Thunderstorm is more dangerous than Brainstorm, he's actually ''worse'' at the whole Mad Scientist thing than Brainstorm is. Brainstorm actually invents things (while Thunderstorm usually just imitates or steals Brainstorm's designs), and his failures leave himself and Earth alive for him to try again, while Thunderstorm's failure in ''Thunderstorm'' would have destroyed the planet, preventing him from ruling it (as well as likely killing him by throwing the satellite he was on out of its orbit).
** Building on the above, Jack actually seems to be a more advanced AI than Shadow. He acts almost exactly like a human, has a distinctive personality, and even a sense of humor. Shadow merely serves Thunderstorm and attacks enemies, and, if it's not to help Thunderstorm, doesn't take initiative. He even [[LogicBomb gets a bit confused]] when faced with Jack while under orders to 'kill everyone' (Jack's a robot, and so not alive). Frankly, a scientist who was able to invent Jack would be more admired than one who could invent Shadow (and not just because people would be scared of Shadow).
* SugarWiki/HeartwarmingMoments: [[Heartwarming/CalvinAndHobbesTheSeries Right here.]]
* MemeticMutation: Among the commentators in the later years of the fic, [[CatchPhrase "IT'S DOCTOR BRAINSTORM!"]] became this.
* SugarWiki/MomentOfAwesome: [[Awesome/CalvinAndHobbesTheSeries They're on this page.]]
* {{Narm}}: While "Have You Seen This Tiger?" is intended to be a {{Deconstruction}} of ThePrankster, the awful prose gets in the way.
--> '''Socrates:''' [[ThatMakesMeFeelAngry You're making me angry, Calvin.]] And when I get angry, it makes me [[RougeAnglesOfSatin what]] to use my claws[[WantonCrueltyToTheCommonComma ,]] and tear something up!
* NightmareFuel: [[NightmareFuel/CalvinAndHobbesTheSeries See this page.]]
* {{Padding}}: Season 1 had a RunningGag where Hobbes would misinterpret something Calvin said or did, and Calvin would retort. The duo would then argue for a painfully long amount of time about something with no meaning to the plot. This has thankfully been phased out.[[note]]It should be noted that a similar chain of events was a RunningGag in the ''Literature/HankTheCowdog'' series, which the author loves.[[/note]]
* PainfulRhyme: Done intentionally with Calvin's love poem from "Insanity is in the Air":
--> "Roses are red, [[ShapedLikeItself violets are violet.]] Just thought I'd mention that, since [[WesternAnimation/SpongebobSquarepants Spongebob]] isn't violent."
* TearJerker: See [[TearJerker/CalvinAndHobbesTheSeries here]].
* WhatAnIdiot: Calvin attempts to fix a satellite dish ''when a tornado is coming.''
* WhatDoYouMeanItsForKids: "Black Rain". A ''[[Franchise/TheSlenderManMythos Slender Man]]'' story on a (fake) ''kid's show?'' [[NightmareFuel/CalvinAndHobbesTheSeries That's only the tip of the iceberg.]]
* TheWoobie: Susie Derkins has the world against her in "Chains".
** Dr Brainstorm in "Thunderstorm" considering he spent most of the movie trying to defeat his friend-turned-enemy who apparently betrayed him and rubbed his temporary victory in his face during the climax.
** Socrates seems to be heading toward an arguable direction towards this in the final season.
----