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%% This list of examples has been alphabetized. Please add your example in the proper place. Thanks!
!!Shows with their own pages
* ''MoralEventHorizon/GameOfThrones''
* ''MoralEventHorizon/OnceUponATime''
* ''MoralEventHorizon/TheSopranos''


* ''Series/AgentsOfSHIELD'' has a few:
** An InUniverse example in "[[Recap/AgentsOfSHIELDS1E5GirlInTheFlowerDress Girl in the Flower Dress]]": Skye decides Miles crossed the MEH by selling Chan Ho Yin out to Centipede for a million dollars. This on top of hacking S.H.I.E.L.D. against her orders. Chan Ho Yin may be a tool, but this revelation made Miles come across as a bigger tool and perhaps irreparably lowered Skye's opinion of Miles.
** Edison Po when he [[spoiler:insists on torturing Coulson's memories of his death out of him]]. Even Raina wasn't pleased that he would resort to potentially deadly torture.
** [[CorruptCorporateExecutive Ian Quinn]], either when he manipulates Seth and Donnie (resulting directly in Seth dying and Donnie becoming the anti-heroic Blizzard) or when he [[spoiler:shoots Skye and then later gloats about it to Coulson (and even before ''that'', we can see he has an extremely callous attitude toward Mike Peterson, viewing him as little more than a weapon).]]
** Lorelei forces a husband to murder his own wife simply because she can and then later rapes Ward whilst he's under her control. However she makes it clear she crossed it many centuries ago, when she gloats to Sif about making her lover a "pet" and using him as a SexSlave. She even forced to Sif to kill him in the end. It's made clear she's done all this and more countless times over her very long life.
** [[spoiler:Garrett]] is clearly over the MEH by the time [[spoiler:he's]] revealed to be the Clairvoyant. Even [[spoiler:his]] most visible crossing point, [[spoiler:provoking Ward into shooting an actor he set up to pose as the Clairvoyant]], happens before [[spoiler:he's implied to have been the Clairvoyant all along]]. However, it is unknown when he definitively crossed the MEH, but [[spoiler:it would appear he crossed it at least fifteen years before the series began, when he targeted Ward and made him think that he was going to protect him (Ward had burned down the house with his abusive brother inside and his parents wanted him tried as an adult), before dumping him in the woods for six months with very little except the clothes on his back and a dog called Buddy. He later ordered Ward to kill the dog because caring about anything is a weakness]]. And if even all that wasn't bad enough for you, his ultimate crossing point comes when [[spoiler:he orders Ward to kill Fitz and Simmons]].
** It is unknown when Daniel Whitehall crosses it, but there are a few indicators that he's perhaps the most vile villain the MCU has ever seen:
*** His InUniverse crossing point is human experimentation with the Obelisk. When he's in her custody, Agent Carter makes it clear that that's a huge part of the reason why she's having him locked up for life unlike other HYDRA scientists.
*** After his release, [[spoiler:he vivisects a youthful-looking woman just to steal her youth from her and de-age himself. That woman, by the way, happens to be Skye's mother]].
*** Even before [[spoiler:the vivisection]] was revealed, he crossed it by [[spoiler:brainwashing Kara Palamas, an act that led directly to her being stuck with May's face for much of the series, her loss of identity, and, ultimately, her death by friendly fire]].
** Agent Calderon, the TokenEvilTeammate for "Real S.H.I.E.L.D.", crosses it in "[[Recap/AgentsOfSHIELDS2E15OneDoorCloses One Door Closes]]" by going over Bobbi's head and trying to kill Skye rather than take her alive as Bobbi had insisted.
** Towards the end of the second season, we start to see just how nasty Jiaying has become since Whitehall vivisected her. [[spoiler:If killing Gonzales and attacking her own city with a stolen S.H.I.E.L.D. Quinjet to manipulate her people into starting a war wasn't enough, murdering Raina and executing helpless prisoners in cold blood, plus planning to effectively doing this to anybody who stands in her way (even if it's her own daughter), confirms without a doubt how far beyond redemption she is.]]
** Any hope that Ward could be redeemed at some point in the series was crushed in "S.O.S." when [[spoiler:not only does he brutally torture Bobbi Morse and plans on killing her, but then he changes that plan to instead setting a trap so that the person who comes to rescue her (most likely Hunter) will get shot to death instead, and Bobbi will have to helplessly watch it happen.]]
*** If that didn't do it, Ward either [[spoiler:shooting and killing Rosalind Price to bait Coulson]] or personally [[spoiler:torturing Simmons out of anger and desperation]] might have.
** Even Simmons crosses it, believe it or not, when she [[spoiler:attempts to frag Ward with a cheap shot and in doing so ends up disintegrating Bakshi; she even admits that she'd try to kill Ward again given the opportunity]]. Not only does Ward criticize it as something the Simmons he knew never would've even ''thought'' of doing, it marks a major change in her character foreshadowed by several dark moments involving her (up to and including death threats and even advocating genocide) earlier in the second season as she abandons the "totally nonviolent" characterization that had defined her up to that point.
** Gideon Malick subjecting his own HYDRA men to the Terrigen fish oil pills without them knowing so either those who were Inhuman would have powers or those who didn't would die, at least in-series. But as awful as ''that'' is, nearly having the nuclear missile destroy New York in ''The Avengers'' while on the World Council puts his crossing long before he was even on the show.
* ''{{Series/Alias}}'': Arvin Sloane was a permanent resident of the HeelFaceRevolvingDoor for four and a half seasons...until he murdered [[spoiler:his own daughter, Nadia]] because she got in the way of his obsession with unlocking Milo Rambaldi's secrets. The show itself treats this act as the crossing of the moral Rubicon, and afterward Sloane is never treated as anything other than the BigBad again.
** While the characters on the show would treat [[spoiler:Nadia's death]] as Sloane crossing, the audience is fully aware, unlike them, that [[spoiler:Nadia's death is not murder]], but an unintentional accident that their unawareness of makes all the more tragic. It's not when he [[spoiler:attacks Sydney later on]] either because he believes [[spoiler:she is Anna disguised as Sydney and that she killed Sydney]]. Thus, he believes in that instance that he's [[spoiler:seeking revenge for her death]]. If he does cross, it's at one of four points: [[spoiler:ordering that Marshall and Rachel be killed when he no longer needs them]] (which could be more to prove a point), [[spoiler:bombing APO (resulting in Thomas Grace's death)]], [[spoiler:shooting under Sydney's feet so she's buried in the snow (which he likely didn't believe would kill her)]] or likely above all, when he [[spoiler:shoots Jack in order to retrieve the Horizon from Sydney]].
* ''Series/AllInTheFamily'': David Dukes guest stars as a young man who, while posing as a police detective, wins Edith's trust as he comes into the house and describes a rapist that is terrorizing the neighborhood ... and it turns out that person is none other than himself! The live audience can be heard groaning as he crosses the MEH.
** In a later interview, Dukes said it was hard to get the tone right for a comedy show. He wanted people to understand how things can turn very quickly and it wasn't going to be a funny experience.
* ''Series/ArrestedDevelopment'': The matriarch Lucille has gone back and forth on how much she really cares for her family. It was Michael's job to try and keep the family together and the company afloat, and a lot of it was done for [[WellDoneSonGuy his parents' approval]]. In the final episode, when Michael learned his son George Michael was missing he was prepared to leave an elitist party to go looking for him, and Lucille scolds him for considering it, saying it would be rude to the guests. Michael, realizing what kind of person she really is, said "[[RunningGag I've made a huge mistake.]]" and left the party anyway.
* ''Series/TheAstronautWivesClub'': Donn Eisele crosses it by abandoning his wife and dying son, then deciding to marry his mistress after the son dies.

* ''Series/BadRobots'': Tez One became malevolent after witnessing humans mistreating their electrical appliances.
* ''Series/BattlestarGalactica1978'': Baltar goes out of his way to show what a monster he is by ordering the Cylon Centurions under his command during the genocide of his own people (whom he had sold out to the machines in exchange for being allowed to live and rule over his own colony like a king). He tells them to massacre all humans after a Centurian tells him that, up to that point, they had been making deals with prisoners for their lives.
** Tory of ''Series/BattlestarGalactica2003'' manages to talk Cally down from spacing herself and her son after learning that her husband is a Cylon... Only to take the baby, knock Cally unconscious and space her herself. [[spoiler: [[TheDogBitesBack When he learns what she did, he doesn't bother to ask questions, he just snaps her neck]].]]
** Tom Zarek is morally ambiguous character who is difficult to label as an outright villain, right up until [[spoiler: he orders marines to execute the Quorum of Twelve when they refuse to support his and Gaeta's mutiny.]]
** Cavil was already pretty evil when he [[spoiler: planned the genocide of humanity]], but in ''[[{{Recap/BattlestarGalactica2003ThePlan}} The Plan]]'' he crosses the line when [[spoiler: he stabs the young orphan boy who's been hanging around him]] because he realizes he's developing sympathy for [[spoiler:the boy]], which is undermining his hatred of humans. In other words, he crosses the horizon on purpose.
*** Cain. She always had a twisted sense of morality, but she completely went past the moral event horizon when she finds out her lovers a cylon, all but telling her crew to gang rape her ex-lover.
*** Surely Cain's MEH was when she [[spoiler: ordered the execution of the families of civilians who wouldn't leave their now stripped-and-defensely ships to join the Pegasus]].
* ''Series/BeingHumanUS'': It'd probably be easier to list character's who ''don't'' cross a Moral Event Horizon. Just the main characters:
** Aiden: Likely crossed a long time ago. One of his most heinous acts onscreen is luring two girls into the house to feed his flayed vampire son. Because he sucks at compelling the girls wake up and he's forced to kill them. As we later find out the ghosts continue haunting and tormenting him afterwards.
** Sally: Shredding Nick, Stevie and a whole roomful of ghosts.
** Josh: Killing Ray
** Nora: Killing her ex-boyfriend
* ''Series/BeverlyHills90210'': In the sequel series of this show [[spoiler: Adrianna Tate-Duncan crosses the MEH when she tampers with her bipolar former friend Silver's medication as part of an escalating war over their mutual love interest Navid. Her previous actions, such as sending a naked picture of Silver to the entire school and poisoning her with tainted tap water, were bad enough, but once she's willing to endanger Silver's health and sanity over a boy, it's hard to see Adrianna as anything but a monster.]]
* ''Series/BigTimeRush'': Crossed in the episode ''Big Time Sneakers'', when Jett Stetson and Jo's publicist plan on faking a relationship between Jett and Jo, regardless of her relationship with Kendall. Jett and Jo's publicist flat out tell Jo and Kendall that since Jett and Jo are an InUniverse FanPreferedCouple, so them dating gives the InUniverse show ''New Town High'' good publicity, and Jo refusing to date Jett will be the end of her carrer. So yeah, they tried to strong arm two teenagers into breaking off their relationship over tv publicity.
* ''Series/BlackMirror'':
** ''Recap/BlackMirrorWhiteBear'': [[spoiler:The protagonist crossed it long before the events of the episode, when she murdered a little girl. Then her oppressors cross it with what they do with her, and the general public with their ''glee'' over her fate.]] [[HumansAreBastards Nobody comes off looking good in this story.]]
** ''Recap/BlackMirrorHatedInTheNation'': Garrett Scholes [[spoiler:jets over this when he causes the deaths of 400,000 people for using a hashtag.]]
** ''Recap/BlackMirrorUSSCallister'': Robert Daly has several candidates. [[spoiler:The one that sticks out is the reveal that when he first introduced Walton to the ''Infinity'' mod he created a digital copy of Walton's son Tommy and [[ThrownOutOfTheAirlock flushed the boy out of the airlock]], and vowed to bring Tommy back to kill him again over and over in much worse ways until Walton complied with his demands.]] He may have also crossed this earlier when [[spoiler:he turned Gillian and Shania into monsters just to make a point to the other crewmates]]. Arguably, just the premise of engaging in endless VideoGameCrueltyPotential against ''sentient'' digital copies of his work colleagues to relieve his frustrations from dealing with them at work might qualify.
* ''Series/BoardwalkEmpire''
** Hans Schroeder from the pilot crosses it when he beats his heavily pregnant wife, Margaret, so badly that she miscarries. Even resident mobster, Nucky Thomspon, is so repulsed that he orders Schroeder's death to serve as a fall guy in a botched heist.
** Manny Horvitz started off as an affable gangster who reacted surprisingly reasonably to Jimmy avoiding paying back a debt. Even his decision to kill Jimmy after Jimmy sent an assassin after him is understandable. However, Horvitz completely crosses the line when he brutally murders [[spoiler:Jimmy's completely innocent wife, Angela]] even as she says she can make Jimmy pay more.
** Gyp Rosetti is by far the most psychotic gangster in the series, as such he has a few potential moments that can act as candidates for when he crossed the MoralEventHorizon.
*** Savagely beating a good Samaritan to death after the man had helped repair his car, just because Gyp saw the man as being condescending. This is also his to EstablishingCharacterMoment.
*** Bombing [[spoiler:Babette's Supper Club]] in a botched attempt to assassinate Nucky Thompson and Arnold Rothstein. While most gangsters can be ruthless and cold-blooded in the pursuit of profit and power, Gyp's bombing was on a completely different level, showing a disregard for civilian casualties never before seen on the show. Gyp calling Nucky the next day to mock him about [[spoiler:Billie Kent being killed in the explosion]] was just icing on the cake.
*** Burying his right-hand man, Tonino's, cousin up to his head in sand and planning on leaving him to drown when the tide came in. Like his first victim, he did this only because he interpreted the man as being condescending. When Tonino begs for mercy since the man is family, Gyp obliges only to bash the man's skull in with a shovel then telling Tonino that he "owes him one."
** While Warren Knox seems like a rabid KnightTemplar FBI Agent, considering the people he's after, his actions can be seen as understandable. Then he detains, abuses and manipulates the relatively innocent [[spoiler:Eddie Kessler]] so badly that the man commits suicide afterwards, and you know he's scum.
** Dunn Purnsley seemed like a classic case of DefeatMeansFriendship when he reappeared as Chalky's NumberTwo. Then he [[spoiler:betrays his boss, aligns himself with Dr. Valentin Narcisse, distributes heroin throughout the Northside community, and cheerfully knifes an innocent priest to death when he attempts to tell Chalky what's going on]].
** Flashbacks to season five reveal that [[RetiredMonster the Commodore]] crossed the line even before he raped and impregnated the thirteen-year-old Gillian, having been a SerialRapist of little girls for quite some time.
* ''Series/BreakingBad'': Just when Walter White crossed the line from AntiHero to VillainProtagonist is a matter of debate. Popular candidates include:
** [[Recap/BreakingBadS2E10Over "Over"]], where he [[spoiler: forces Walt Jr. to drink tequila until he vomits.]] While this is far less horrible than many of the others, it has the distinction of being the first time he did something terrible for no conceivable rational reason, but just because he could.
** [[Recap/BreakingBadS2E12Phoenix "Phoenix"]], where he [[spoiler: stood by and watched Jane slowly choke to death during her sleep]]
** [[Recap/BreakingBadS3E13FullMeasure "Full Measure"]], where he [[spoiler:emotionally blackmails Jesse into murdering a defenseless man in cold blood, to save his own skin]]
** [[Recap/BreakingBadS4E13FaceOff "Face Off"]], when he [[spoiler: poisoned a child (albeit non-lethally) as part of an elaborate scheme to get Jesse on his side against Gus.]]
** [[Recap/BreakingBadS5E7SayMyName "Say My Name"]], where he [[spoiler: shoots Mike in a fit of rage after blackmailing proves unsuccessful.]]
** [[Recap/BreakingBadS5E8GlidingOverAll "Gliding Over All"]], where he [[spoiler: has nine men brutally murdered just to save himself some money--and on the off-chance that one of them ''might'' have eventually ratted him out.]]
** [[Recap/BreakingBadS5E11Confessions "Confessions"]], just when you thought he couldn't get any lower, he [[spoiler:makes a "confession tape" implicating his brother-in-law, Hank, as the mastermind behind everything.]]
** [[Recap/BreakingBadS5E14Ozymandias "Ozymandias"]] begins with Walter [[spoiler:giving up Jesse to the Nazis, then telling Jesse how he let Jane die, even though he could have saved her]]. Towards the end of the episode, he [[spoiler:kidnaps his infant daughter, believing she didn't know enough to turn against him. [[AllForNothing He]] [[TearJerker was]] [[IWantMyMommy wrong]]]].
** There are several candidates for Jesse as well:
*** Killing [[spoiler:Gale]] in Season 3.
*** [[spoiler:Selling meth to recovering addicts]] in Season 3 with Skinny Pete and Badger.
** Gus' MoralEventHorizon came when he [[spoiler:threatened to kill Walt's entire family, including an infant girl]] in [[Recap/BreakingBadS4E11CrawlSpace "Crawl Space"]].
** He may have [[spoiler:given the order to kill Tomas]], in which case he crossed it in [[Recap/BreakingBadS3E12HalfMeasures "Half Measures"]].
** Todd crosses this when he [[spoiler:murders a child]] at the end of [[Recap/BreakingBadS5E5DeadFreight "Dead Freight"]].
** Jack does it by, what else? [[spoiler:Killing Hank of course!]]
** Leonel and Marco Salamanca cross this when they slaughter every passengers in a truck.
* ''Series/BuffyTheVampireSlayer'':
** For many fans, Buffy stopped being a hero and became merely a "protagonist" during season three when she decided to feed another human being -- Faith -- to a vampire just because she wanted her dying boyfriend back. While many acknowledge that Faith had, at that point, done many reprehensible things and might have deserved to be killed, the fact that Buffy was going to do it by '''''feeding her to a vampire''''', thus betraying her calling as the protector of humanity against such monsters, was the part that they simply could not swallow.
** Whenever a villain tortured a member of the Scooby Gang, they tended to be seen as having gone just plain too far. Such as [[spoiler: when Angelus tortured Giles to get information]], and when in ''Angel'', [[spoiler: Faith tortured Wesley, in an attempt to get Angel to [[SuicideByCop murder her because she could no longer live with herself.]]]]
** For the first half Season 6, The Trio are presented as little more than incapable comic relief, posing no real threat to The Scoobies or society. The murder of Katrina however, cements Warren as a full-blown misogynist with no care for anyone (including his lackeys) and no chance for redemption.
** WordOfGod says that Angelus's murder of [[spoiler: Jenny Calender]] in S2's "[[{{Recap/BuffyTheVampireSlayerS2E17Passion}} Passion]]" was important for the purpose of displaying how evil Angelus had become. Before that act, Angelus had murdered at least 4 people since being turned, but had not yet committed an offense so grievious to the audience (and the Scoobies) that it became a serious question as to whether or not it was even possible to redeem Angel, and if it was would anyone (besides Buffy) want to do it?
** If it wasn't the AttemptedRape and murder of Xander, Faith trying to kill Angel is an InUniverse example, motivating Buffy to feed her to him or kill her trying to do so. When she recovers Faith also essentially rapes both Buffy and Riley [[GrandTheftMe (she uses Buffy's body to try and get Riley to sleep with her.)]] Buffy is so furious she is willing to go through Angel in her attempt to kill her, but Angel defied this trope by claiming that despite all this, Faith still wasn't too far gone.
** Buffy, if she didn't do it with her earlier actions in season 3, then it was because of her actions in "[[Recap/BuffyTheVampireSlayerS7E15GetItDone Get It Done]]" caused some fans to be so disgusted that she was beyond redemption. Such a view is pretty universal in regards to [[TheScrappy Kennedy]] for the same reasons, who is utterly loathed by pretty much all of the fanbase, and considered completely irredeemable.

* ''Series/{{Chuck}}'':
** [[spoiler:Vivian Volkoff betraying her father Alexei Volkoff and leaving him to die, taking a bioweapon with her, which she fully intends to use.]] The significance of this stems from the fact that up to this point, the audience was led to believe that she was [[spoiler:taking over the family business]] in order to get her father back, but this event and her dialogue during the act show that she's in it [[ForTheEvulz for the power]] and her hatred of Chuck for what is now essentially no reason.
** Although "evil" is not part of the equation in either case, when Chuck witnesses [[spoiler: Sarah cold-bloodedly execute a FULCRUM agent]] and later Sarah sees what she believes to be [[spoiler: Chuck committing his first cold-blooded kill, albeit one he was ordered to commit, not knowing Casey actually pulled the trigger]], both feel the other crossed the horizon and it negatively impacts their relationship for a while.

* ''Series/{{Dallas}}'': Oh, Cliff, on account of practically [[spoiler: '''murdering''' your own unborn grandchildren. By causing an explosion on a rig which your own daughter was and was pregnant with twins and still going on with it. For many you would stop and say "no way". But he pauses and thinks about it.]] Yes, you've crossed it hand down.
* ''Series/{{Degrassi}}'': This show is generally more concerned with redemption, though Rick even lampshades his own: "It's too late. I already shot someone."
* ''Series/{{Dexter}}'': Not really applicable to the title character, but for [[spoiler:Miguel]], definitely the murder of [[spoiler:Ellen]]. Total violation of The Code.
** And how about [[spoiler:Lila]] killing [[spoiler:Doakes]]?
** Though one could argue that Dexter himself crossed it by [[spoiler: allowing the death of LaGuerta to proceed, thus permanently corrupting his sister, all out of self-preservation]].
** [[spoiler:Deb crossed it by killing Laguerta]].
** The skinner crossed it by skinning a young boy to death.
* ''Series/DoctorWho'':
** WordOfGod confirms that in [[Recap/DoctorWhoS2E9TheTimeMeddler "The Time Meddler"]], the Vikings did, in fact, rape Edith.
** One could argue [[Recap/DoctorWhoS18E7Logopolis "Logopolis"]] for The Master when he was portrayed by Creator/AnthonyAinley. Yes before he had manipulated, threatened, and killed lots and lots of people, but compared to the number of people The Doctor had manipulated, threatened and killed, they were basically even, and before Delgado died he was even supposed to have a DeathEqualsRedemption plot. And then, when he gets a proper new body again, he destroys one-quarter of the universe, including the home planet of one of the Doctor's companions (though admittedly that was an accident he caused by going on a killing spree). And the new body he got is the corpse of said companion's father. After that, there was really no going back for that specific incarnation.
** In [[Recap/DoctorWhoS24E4Dragonfire "Dragonfire"]], Kane has the tourists, passers-through, and residents herded into a spacecraft and blows it to Kingdom Come.
** In [[Recap/DoctorWhoS26E3TheCurseOfFenric "The Curse of Fenric"]], Millington locks two men up in a cellar, leaving them to their Haemovorey death.
** [[Recap/DoctorWhoS30E17E18TheEndOfTime "The End of Time"]]:
*** [[spoiler:Why is Master insane? Because Rassilon put the signal of drumming into his head to save himself and Gallifrey!]]
*** And, of course, [[spoiler:Rassilon's battle cry: "For victory! FOR GALLIFREY! FOR THE END! OF TIME! ITSELF!"]].
** In [[Recap/DoctorWhoS33E11TheCrimsonHorror "The Crimson Horror"]], when [[spoiler: Mrs Gillyflower takes her own daughter hostage]].
** Invoked by [[http://www.denofgeek.com/tv/doctor-who/32928/doctor-who-steven-moffat-on-series-8-missy-lies-and-leaks Moffat in an interview]], who is well aware of Missy's DracoInLeatherPants tendencies. In [[Recap/DoctorWhoS34E12DeathInHeaven "Death in Heaven"]], he had her kill off fan-favorite Osgood to remind us that just because she's a woman now the Master isn't any less of a psycho she's always been.
** "[[Recap/DoctorWhoS33E13TheNameOfTheDoctor The Name of the Doctor]]" and its followup, "[[Recap/DoctorWho50thASTheDayOfTheDoctor The Day of the Doctor]]" reveal that an incarnation of the Doctor was forced to cross the horizon [[spoiler: in order to end the Time War. In doing so, he refused to accept the name Doctor, and his later incarnations effectively disowned him. ''Day of the Doctor'', however, reveals that events played out differently than the Doctor remembered, and he never actually crossed the Moral Event Horizon at all.]]
** In the opinion of the Eighth Doctor, the point where he decided he would be willing to destroy the AlwaysChaoticEvil Daleks is when the [[BigBad Dalek Time Controller]] engineered the second Dalek invasion of Earth, planning to turn it into a plague planet and pilot it around the Universe to wipe out all other life.
** '''The Doctor''' nearly crossed this in [[Recap/DoctorWhoS30E16TheWatersOfMars "The Waters of Mars"]]:when he decides to save Adelaide without respect to time laws and possible catastrophes. He does it very smugly, not at all caring about Adelaide's worries when she pulls What the Hell, Hero? on him. Only her suicide [[MyGodWhatHaveIDone leads him to remorse]] and averts it. Keep in mind that it was a fixed point. The whole universe could have been destroyed.
** Donna was absolutely right that Doctor needs a companion as a MoralityChain. What happens to the Doctor when a companion is [[spoiler: killed thanks to a Senseless Sacrifice]] in "[[Recap/DoctorWhoS35E10FaceTheRaven Face the Raven]]" and he is immediately imprisoned in a torture chamber, all alone save for the MonsterOfTheWeek, in "[[Recap/DoctorWhoS35E11HeavenSent Heaven Sent]]"? He is ultimately DrivenToMadness and his torment becomes [[spoiler: a Self-Inflicted Hell]] before he manages to escape. Due to these mounting horrors and '''absolutely no one around him caring about or even realizing''' what he's endured, in "[[Recap/DoctorWhoS35E12HellBent Hell Bent]]" the Doctor becomes TheUnfettered WoobieDestroyerOfWorlds willing to risk the destruction of the universe just to [[spoiler: save Clara from her death]], again changing a fixed moment in time. The moment of truth comes when he intends to [[spoiler: Mind Rape Clara to protect her from his enemies]]. Will he go through with it and lose all hope of redemption? As it turns out, no. Even after all his torment, none of it just, he not only repents for going too far but accepts [[spoiler: losing her for good]] '''and''' [[spoiler: being Mind Raped himself and thus losing his memories of her]] as just punishment on his way to returning to his best self.

* ''Series/{{ER}}'': VillainOfTheWeek Derek Fossen in Season 7's two-part finale. In the first part, Greene learns Fossen is an {{Abusive Parent}}, so the former decides to help the latter's son escape into foster care. And in the second part, how does Fossen respond? By [[AxCrazy completely snapping]] and invoking GoingPostal [[DisproportionateRetribution on anyone even-remotely connected to him (justifiably) losing his son (and soon just everyone in Fossen's way), eventually threatening Greene's own family for some cold-blooded irony]]. [[spoiler:Thankfully, Fossen is finally stopped and critically injured... but then [[OhCrap finds himself under]] [[PapaWolf Greene's]] [[VigilanteExecution care]].]]

* ''Series/FallingSkies'': The [[AlienInvasion Espheni]] pretty much start on the far side of the Horizon, what with killing the majority of humanity and all, but they prove themselves to be completely devoid of reasons for sympathy when we find out that the Skitters are SlaveMooks, and they plan to do the same to humans. That and changing their tactics to [[PuttingOnTheReich building Hitler Youth-type camps for children.]]
* ''{{Series/Fargo}}'': Lester Nygaard starts off as a fairly sympathetic character, being a loser who is frequently henpecked by his wife, overshadowed by his more successful younger brother, and still harassed by his old high school bully. Even after he kills his wife in a rage he remains sympathetic. He only truly crosses the line into irredeemably evil either when he [[spoiler:unashamedly frames his younger brother for his first wife's murder]] or when he [[spoiler:uses his second, loving wife as a decoy, ensuring her death at the hands of Lorne Malvo]].
* ''Series/{{Firefly}}'': Viewers can usually tell when a villain is about to die horribly when they threaten Kaylee or River. Dobson threatened ''both of them'' in the pilot, and it did not end well for him.
** In [[Recap/FireflyE14ObjectsInSpace the final episode]], Jubal Early subdues Kaylee by [[RapeIsASpecialKindOfEvil threatening to rape her.]]
** Jayne comes ''very'' close to crossing it in "[[{{Recap/FireflyE09Ariel}} Ariel]]", [[spoiler: when he tries to sell Simon and River to the Feds.]] He almost gets ThrownOutTheAirlock by Mal, but [[spoiler: that turned out to be a SecretTestOfCharacter, which he just barely passed.]]
** In "[[{{Recap/FireflyE10WarStories}} War Stories]]", Niska crosses the line when he kidnaps [[spoiler: Mal and Wash]] and starts torturing them to death. This brings the wrath of the rest of the crew directly down on his head.
*** Made even worse when we realize [[spoiler: Mal actually ''dies from it'' and ''he brings him back to life so he can continue torturing him.'']]
* ''Series/TheFlash2014''
** The Reverse-Flash passed this long ago. First, he traveled back in time to [[spoiler:[[WouldHurtAChild kill a young Barry Allen]], but failed thanks to interference from the Flash. Instead, he settles on [[KickTheDog killing Barry's mother]] then leaves. However, he discovers that he's TrappedInThePast. He knows exactly what happens in history so he kills Wells' wife for no reason, takes the [[SurgicalImpersonation genetic]] [[BodyHorror code]] [[PainfulTransformation of the]] ''[[KillAndReplace real]]'' [[NiceGuy Dr. Wells]], and creates all the events of the series on purpose, with complete disregard for all the lives of others]]. All so he can get revenge on Barry and steal his speed for [[ItsAllAboutMe himself]].
** Lewis Snart put a bomb in his own daughter's head to make his son work for him.
** Zoom's first appearance on Earth Two was to fake a call about hostage situation and kill 14 out of 15 cops that came to rescue them. The last one was spared to tell the tale... and after he did, Zoom murdered him too.
** In "Running to Stand Still," the Trickster and Weather Wizard pass out hundreds of bombs ''to children'' all across the city by disguising the Trickster as [[BadSanta Santa Claus]]. When the Flash discovers this, the two gleefully laugh about how they will blow up multiple families if the Flash doesn't let them beat him to death slowly.
** Deathstorm's casual admittance that he hasn't let Martin Stein [[AndIMustScream out in years]].
** Zoom's father murdering his wife while making his young son watch.
** Pictured above, Zoom [[spoiler:[[ImpaledWithExtremePrejudice impaling Barry's father]] [[ForcedToWatch right in front of Barry]], just so he can prove to him that the two of them are NotSoDifferent]].
** Although Savitar has doubtless committed multiple atrocities during his travels throughout time, he finally draws the complete ire of Team Flash by [[spoiler:killing Iris in the future, driving Barry into an eight-year-long HeroicBSOD and splitting both the team and the West family apart in the process.]] It gets even worse with the reveal that Savitar [[spoiler: is none other than [[FallenHero Barry Allen]] himself via the Flash [[StableTimeLoop creating a time remnant in the future to stop Savitar]]. After his complete ostracization from Team Flash and a who-knows-how-long MindRape in the Speed Force, Savitar/Future Flash hates his former self and friends so much that he is willing to kill the love of his life and break his family apart out of pure spite. It really says something that his ''entire existence'' is a direct result of crossing the MoralEventHorizon.]]

* ''Series/GeneralHospital'':
** A couple Inverse examples: Sonny, at first, believed Andrei Karpov crossed it by shooting his fiancé Kate Howard/Connie Falconeri on their wedding (it was actually faux cripple Anthony Zacchara who framed Karpov) and attempted a few times to pay him back for it. This drove Karpov to stab Sonny, have him chained to an anchor, then dropped in the harbor and left for dead. Believing he's about to die, Sonny asks Karpov to admit what he did and when he doesn't, that convinces Sonny that he did not do it. Sonny survives. However, even though he knows now that Karpov is innocent of Kate/Connie's shooting, Sonny believes Karpov's crossed by attempting to kill him in the first place and that it must now be answered for. It is indeed as Sonny shoots Karpov dead in revenge for the attempt on his life.
** It's bad enough that Fluke, [[spoiler: the alternate personality of Luke Spencer, seems to have]] imprisoned Luke in a mental institution while taking over his life (it's HarsherInHindsight now that you realize he's [[spoiler: actually imprisoned Luke in his own mind]]). On top of that though, he's demanded people who either got in the way of his plans for the mob and Port Charles or [[YouHaveOutlivedYourUsefulness no longer served a purpose to him]] be killed, but on top of that, he threatened Emma Scorpio-Drake when Spencer Cassadine found out his plans to dethrone Sonny and threatened to tell (Spencer being Luke's grandson), attempted to kill his gunshot victim Lucas Jones (Luke's nephew), and several other things (as well as making everyone believe that Luke was rescued from captivity when it wasn't the case at all). However, the lowest of low is when Fluke sought to bomb the Haunted Star with 50+ people on it (including member's of Luke's own family). Not that's a SPECIAL kind of evil. Unless that did it for you, Fluke crossed the moment he [[spoiler: took over Luke's body to do all these heinous things from the start and kept him from his family and life psychologically]] as that pretty much defines just how evil he is from the start.

* ''Series/TheHavesAndTheHaveNots'': Veronica Harrington has numerous MEH-worthy moments, but she definitely crosses it in Season 3 when [[spoiler:she orders Quincy, a convicted murderer she freed from prison, to beat up her own son Jeffrey if he didn't tell her where Candace was. When she's later confronted by her husband David about this, she vehemently admits that she ordered Quincy to "beat the gayness" out of Jeffrey.]]
* ''Series/{{Heroes}}'':
** In volume 3, you're being subtly led to believe that you've been too quick to judge Sylar. When [[MessianicArchetype Peter Petrelli]] [[spoiler: gains Sylar's ability for a while, he goes from saintly nurse to AxCrazy and nearly kills his own mother on sight out of the hunger for power before restraining himself]], which makes you wonder, especially since [[spoiler: to get that power Peter had to go to a future where Sylar is an upright family man and has undergone a total HeelFaceTurn]]. You also get to see that Sylar was [[spoiler:so remorseful over murdering his first victim that he tried to commit suicide]]. He goes to [[spoiler: Elle]], whose father he killed, to plead for forgiveness and goes through what seems to be a LoveRedeems subplot with her. Then he [[TheFarmerAndTheViper randomly decides he's had enough of being a nice person]] and ''kills her'' all because of random soap opera shenanigans that barely have anything to do with her. At this point you concede the point the writers were trying to make - that is, that this man is not right in the head. You also want him to die.
** Sylar blamed her for helping to make him a killer (although it was mostly Noah's doing.)
** Emil Danko: If it wasn't for ordering his men to open fire on illegally-abducted captives after their plane crashed, or for [[spoiler: arranging Tracy's escape and sacrificing one of his own men]] to justify the government's practice of warehousing "specials," it was for [[spoiler: removing Daphne Millbrook from the medical facility, resulting in her death from complications (sepsis) from a gunshot wound she sustained on Danko's orders (see above).]]
** Samuel Sullivan: Depending on whether or not you subscribe to AMillionIsAStatistic, he either crossed it when he destroyed a town in a sinkhole or when, to regain the carnival's leadership after this depraved act, he pretended to surrender himself to Noah Bennet, then had Eli shoot up the carnival, killing Lydia (the only other carnie who knew he killed Joseph) and framed Noah for the whole thing. Samuel on other occasions had sinkholed a police station and a mansion but the people there were sufficiently "demonized" that those were KickTheDog moments in contrast with the massacre of a town full of people.
* ''Series/{{Holocaust}}'': In this miniseries, Erik Dorf crosses the Moral Event Horizon when he orders Karl Weiss tortured. He knows that Karl Weiss is the son of the man he once trusted as a friend, yet he still does it. Karl ultimately dies as a result of the torture. Before Dorf was sort of sympathetic, but after this, it became extremely hard to sympathise with him.
* ''Series/HomicideLifeOnTheStreet'': Detective Kellerman crosses it, not with [[spoiler:the VigilanteExecution of Luther Mahoney]], which was arguably justified, but a scene a few episodes later in which he makes light of a murdered drug dealer, even posing for a picture with the young man's corpse. From that point on, he stops being portrayed as a CowboyCop AntiHero and becomes just an unlikable, self-centered {{Jerkass}} whose eventual departure from the police force is mourned by no one.
-->'''Ballard:''' We speak for the dead, remember?
-->'''Kellerman:''' Screw the dead. What have their moldering asses ever done for me?
* ''Series/HoratioHornblower'': In this mini-series, Jack Simpson crosses the line by trying to murder the titular character and another midshipman during a raid. He was despicable before that, but shooting one of your shipmates in the head just after setting adrift the jollyboat that another one is lying unconscious in? That's just evil, even if they both survived. Especially as the latter case resulted in said shipmate being presumed dead by his friends, captured by the enemy, and imprisoned for what appears to be a couple of years.
* ''Series/HouseOfAnubis'':
** For Rufus, it's when he traps the students in the school, threatening to kill them with an extremely painful death if the Society doesn't hand over the Cup Of Ankh and TheChosenOne.
** For Vera, it's [[KickTheDog Kidnapping Trudy]].
** For Senkhara, it was cursing Nina's grandmother. She had also been revealed to had murdered King Tut while she was still living...
** In the third season, Miss Denby does a lot of horrible things. Two contenders are-
*** When she tricks Patricia into thinking Eddie was cheating on her, causing Patricia to break down in tears for the first time on the show, and then turning her into a sinner- and according to Eddie's vision, it involved a lot of dragging and fighting to get her in the coffin.
*** Drugging her own, kind of crazy adoptive sister, keeping her locked in the basement and stealing her title as "The Keeper", which caused Robert Frobisher-Smythe to wake up evil.
** Victor, despite having been a sympathetic AntiVillain in the other seasons, crossed this when he set up a ''guillotine'' to stop the students from getting into the secret room. He tested it by having it ''cut a dictionary in half''. And he was very pleased with this. Of course, he was a [[TheSoulless sinner]] at this time, so it does make a bit of sense. But it's the first time he's ever shown willingness to murder the students, a jarring change from his former EvenEvilHasStandards trait.
* ''Series/HouseOfCardsUK'': In case his psychotic Machiavellian behaviour hadn't tipped you off, the TV version ends with the [[spoiler:murder of Roger O'Neill and ''Mattie Storin'' by the VillainProtagonist Francis Urquhart MP, all in pursuit of the leadership of the Conservative Party and thus Prime Minister-ship.]] After this, the character is hard to see as anything other than sheer, concentrated evil. [[EvilIsCool But stylish evil.]]
* ''Series/HouseOfCardsUS'': Underwood is evidently an unpleasant man right from the pilot but [[spoiler:the murder of Peter Russo]] is a game-changer.
** Doug Stamper was cast in a significantly more sympathetic light early on in the series (or at least more pitiable), but [[spoiler:murdering Rachel]] cemented his evil status, pitiable or not.

* ''Series/{{iCarly}}'': Nora and her family gleefully holding Spencer hostage to keep the iCarly gang imprisoned, torturing him if they do anything they don't like. What ''really'' pushes this over is Nora's implying that she can and will ''kill'' him if they make a wrong move.
** She could've also crossed it when she tried to kill Gibby in iPsycho.
* ''Series/IClaudius'':
** This is a series populated by devious conniving bastards who get away with some pretty horrible acts, but one of the worst dog-raping examples is provided by PraetorianGuard captain [[BastardUnderstudy Macro]] when his predecessor Sejanus falls out of favor with the Emperor. Macro kicks off a bloody purge of everyone even remotely connected with Sejanus. Rome's streets run red, but the icing on the cake is when he orders the death of Sejanus's (very) young daughter. An officer reminds him that it's unlawful to execute a virgin. His response? "Then make sure she's not a virgin when you kill her, now GET ON WITH IT!"
** [[TheCaligula Caligula]] wasn't a great guy to begin with. He had already killed a lot of people, [[SelfMadeOrphan including Germanicus]], before becoming Emperor and deciding he was [[AGodAmI a god.]] But he didn't go fully [[AxCrazy off the deep end]] until he cut his [[BrotherSisterIncest wife]] open and [[EatsBabies ate]] their unborn child.
** Messalina might have cheated on her husband and become the biggest whore in Rome. And yeah, wanting to sleep with her stepfather, and then accusing him of trying to rape her when he rejected her, sure was bad. But she didn't reach the Moral Event Horizon until she threatened her own mother!

* ''{{Series/Justified}}''
** Bo Crowder crosses it when, in revenge for his son, Boyd, destroying a shipment of drug supplies Bo was meant to receive, he massacres Boyd's loyal followers and strings up their bodies for the Boyd to find, solely to rub salt in the wound.
** Coover Bennett is a DumbMuscle ManChild for the Bennett family, but he manages to cross the line when he tries to [[WouldHurtAChild murder the fourteen-year-old]] Loretta [=McCready=] just because he was jealous of the attention she was receiving from [[EvilMatriarch Mags Bennett]]. First, however, he plans on showing her the shaft where he tossed her father's body down before throwing her down herself.
** Dickie Bennett seems like a stupid but pitiable BigBadWannabe. Then he murders the relatively innocent [[spoiler:Helen Givens]] and tries to arrange for his DirtyCop brother to frame his remaining accomplice for the deed then murder him afterwards to ensure his silence.
** Fletcher "The Icepick" Nix seems like a perfect example of EvilIsCool before quickly revealing his true colors as a sadistic PsychoForHire. Robbing a man known for his skill in using a gun, Nix arranges a "duel" between the two of them, with the rules being that after counting down from ten, both contestants will try to grab a gun placed in the middle of a table. He even orders a pizza so he could abduct the deliveryman and force him to act as the referee for their duel. Once the countdown is done, however, Nix cheats by impaling his opponent's hand with an icepick, then shoots both him and the referee. He basically turns a harmless robbery into a double homicide solely ForTheEvulz.
** Nicky Augustine, a high-ranking Detroit mobster, crosses it in his EstablishingCharacterMoment. One instant he's casually joking around with a [[ChildhoodFriends childhood friend]], who had been using his position in the FBI to help Augustine through Augustine's life, and the next he shoots said friend dead for failing Theo Tonin. Granted the victim, [[spoiler:Barkley]], was a supreme asshole, but it's chilling the way Augustine offs him with barely a change from his [[SmugSmiler constantly smiling expression]].
** Danny Crowe crosses it with his casual murder of [[spoiler:Jean-Baptiste]] merely because the man stood up to him and told him to stop bullying Danny's own younger brother, Kendal.

* In ''Series/KickinIt'' the Black Dragons, the main antagonists of the series, have committed multiple MoralEventHorizon-worthy deeds.
** In ''Wrath of Swan'', Frank crosses the line when he has Brody bring Kim to Swan Cotillion, and then fires gravy on to Jack and Kim
** Sensei Ty has crossed it in the past, continuously blaming Rudy for causing him to fall even though it was the Grandmaster who tooted. In ''Kickin It on Our Own'', he is brutal to the Wasabi Warriors, taking away Jack and Kim's black belts (he obviously had no right to do that), and forcing Eddie and Milton to drink heavy amounts of water to fight for their right to use the rest room. None of this grants Sensei Ty any points whatsoever.
* ''Series/KitchenNightmares'' featured at least 2 unforgettable moments of line-crossing:
** The owners of the ''Burger Kitchen'' stole their son's inheritence to fund their restaurant.
** Samy and Amy, the owners of ''Amy's Baking Company'' left the line behind long ago with the revelation that they were stealing the tips left for the servers and were keeping them for themselves.

* ''Series/TheLeftovers'':
** The Guilty Remnant, who believe that everyone in the world should basically be like them (i.e. stop living their lives and spend their time being miserable in the wake of the Departure), spend most of the series annoying the townspeople of Mapleton and generally being obnoxious, but they don't really deserve [[spoiler: to have one of their own be caught and [[NightmareFuel stoned to death]] at the start of "Gladys"]]. And they don't do anything to ''really'' cross the line until "The Prodigal Son Returns" when the meaning behind their actions throughout the season becomes clear; [[spoiler: they basically rub it in the town's faces by setting up mummified corpses to stand in for the people who vanished, placing them in the last places they were before they left - not so much pressing a BerserkButton as jumping up and down on it. You can't blame the people for [[UnstoppableRage not taking it well at all]].]]
** Meg Abbott, who by season two is in charge of her chapter of the Guilty Remnant, pretty much crosses it herself in "Ten Thirteen" by not only [[spoiler: trapping the children on a schoolbus with a grenade inside, even though it's a dud (the GR, for all their sins, never go after kids and don't attack people unprovoked)]] but also [[spoiler: having a guy who wandered onto the compound outside Jarden stoned to death simply for being there, even though he didn't see anything and has no idea what her plan is]]. And in "I Live Here Now" she goes even further across it by [[spoiler: having all the people hanging around Miracle break in and trash the town, for no apparent reason other than to punish them because she didn't get what she wanted from visiting.]]
* ''Series/LifeOnMars2006'' and ''Series/AshesToAshes'': Gene Hunt has probably crossed this line somewhere in his assaulting of suspects, liberal use of the JackBauerInterrogationTechnique, and stitching up innocent people. Where and when, and indeed if he has is highly subjective depending on your view of criminals. Jim Keats, however, gets a pretty clear one in Season 3 when he [[spoiler: appears to [[{{Psychopomp}} forcibly harvest Viv James' soul]], obviously a horrific experience for the latter. It is later implied poor Viv [[{{Hell}} did not go to a good place]].]]
* ''Series/{{Lost}}'':
** We all knew [[PsychoForHire Martin Keamy]] was bad news from the get go, but he firmly crossed the line in "The Shape of Things to Come", where he [[spoiler: coldheartedly murdered Ben's daughter, just for the sake of proving he wasn't fucking around. Needless to say, he is quite possibly the only ''Lost'' character to ever cause [[MagnificentBastard Ben Linus]] to [[VillainousBreakdown lose his cool.]]]]
** If you think [[ArchnemesisDad Locke's father]], Anthony Cooper, hasn't crossed this by Season 3, "The Man From Talahassee" will obliterate that theory. He murders the son of one of his con victims for threatening to expose him, and when Locke confronts him about it, Cooper [[spoiler: throws him out of an eight-story window, shattering his spine]].
** The producers purposely used this trope with the Man in Black, saying that they meant his [[spoiler:causing Sun, Jin and Sayid's deaths]] to mark him as irredeemably evil. ''Then'' the show offered his FreudianExcuse StartOfDarkness flashback.

* Don Draper on ''Series/MadMen'' has a lot of moments that make him irredeemably horrible -- but probably the biggest is [[spoiler: when he is caught cheating on Megan with Sylvia by his daughter Sally. The crossing of the horizon doesn't fully occur though until he chooses to explain the situation away to Sally by saying he was "comforting Sylvia". Sally doesn't believe him.]] Big shocker.
* In the ''Series/MalcolmInTheMiddle'' episode "Malcolm Defends Reese", Malcolm's scheming principal, Lionel Herkabe, who kept dragging Malcolm into his schemes only for Malcolm to get wise to his act before they can succeed, crosses it when he rigs Malcolm's grades by humiliating his brother Reese simply because Malcolm's GPA was about to exceed his. It's probably not a coincidence that after Herkabe got humiliated at the end of the episode, he made no further appearances on the series.
* ''Series/{{Merlin 2008}}'':
** Morgana spent from a year away from Camelot in the company of her half-sister and returned as TheMole, having performed a FaceHeelTurn in the interim. Over the course of the third season, her plots to bring down her [[spoiler:father and half-brother]] have intensified in brutality, but it's not until ''Queen of Hearts'' that she crosses the line and ends up framing her servant and former best-friend Guinevere for witchcraft. Why? Because she had a dream that Gwen would one day become Queen of Camelot. Up until that point, fans were capable of some degree of sympathy for Morgana's WellIntentionedExtremist views, but after seeing her smiling to herself as a terrified Gwen is hauled away to be burnt at the stake, the general consensus became: "the bitch must die!"
** Uther from that same series passed the horizon before the series even started. He committed the "Great Purge" in which he hunted down and killed anyone with magical blood, even drowning children of magical parents in fear that they inherited magical blood.
* The ''Series/MyNameIsEarl'' character Ralph Moreno was a borderline AxCrazy crook with a huge case of ChronicBackStabbingDisorder from the start. But, he hits a new low after an elderly widow takes him in, after he escapes prison with nothing but his underwear, only to mistake him for her dead husband. Ralph's first instinct is to take complete advantage of her, by asking for "their" ATM number, driving around in her dead husband's car, looting the medicine cabinet, and generally using her confusing to mooch off of her.

* ''Series/{{NCIS}}'': Recurring antagonist Ari crossed the MEH when he murdered [[spoiler: Caitlin Todd]], not to further any mission objective, but purely to cause pain to Gibbs and the team.
** Gibbs believes he crossed it earlier in his first appearance, when he shot Gerald in the shoulder, as it wasn't necessary to maintain his cover.
** We later learn that Ari's father, Mossad Director Eli David, had crossed the event horizon decades ago when he deliberately raised his son to be such a monster. It turns out not to be the worst thing Eli has ever done, either.
* ''Series/{{Nikita}}'': [[BigBad Percy]] most definitely crossed the MEH with the TheReveal that [[spoiler: Kasim, the terrorist who killed [[TheDragon Michael's]] family, was a Division agent who did so on Percy's orders in order to both infiltrate Al-Qaeda and make Michael so desperate for revenge that Percy was easily able to recruit him]].

* ''Series/OneTreeHill'': Dan Scott murdering his brother Keith in cold blood, and then pinning it on Jimmy Edwards, who had taken a gun into Tree Hill High & ultimately killed himself. Much like the Spike example in ''Series/BuffyTheVampireSlayer'', this is notable as Dan feels the guilt of what he did & tries to atone for his actions.

* ''Film/PerfectAssassins'': Greely crossed it in the backstory, when he started his Skinner box experiments on a young Ben Carroway, then framed Ben's mom when he's caught.
* ''Franchise/PowerRangers'':
** ''Series/PowerRangersSamurai'': In the episode "Trading Places" the MonsterOfTheWeek Switchbeast goes around city and turns innocent people into various objects. The point of this plan is that unsuspecting humans will get rid of those objects, unaware that there are human souls in them. This would have resulted in a lot of people being ''killed'' (including Rangers, Bulk and Spike) if Mike and Emily didn't defeat Switchbeast. That was the entire point of Switchbeast's plan: to have as many innocent people turned into objects and would have been disposed and destroyed by unsuspecting humans. Usually Nighloks want to make misery, but this time they wanted to ''kill'' innocent people.
*** In the eyes of Dayu, BigBad Master Xandred crosses this when he sets her harmonium ([[spoiler:which was a gift by Deker, when they were married and it was LAST remnant of her love for Deker, who was cursed and lost his memory of her]]) on fire and attempted to have her memory erased. She even says "I knew you were evil, but this!"
*** He ''really'' crosses it by [[spoiler:killing and [[DevourTheDragon absorbing her]] after she revived him.]]
** Serrator crossed it 200 years ago by [[spoiler:making a DealWithTheDevil with Dayu, turning Deker into a half Nighlok and taking his memories, not telling her that until she's already made the deal.]] The more the two of them suffer, until finally [[spoiler: meeting their tragic ends]], the more you'll consider Serrator the most heartless villain in the history of ''a show whose villains often pride themselves on how evil they are.'' If he didn't cross it then, he most certainly did with his endgame. [[spoiler:He wanted to split open the earth, spilling the Netherworld onto Earth, likely causing untold death and destruction all for the sake of becoming powerful enough to rule both worlds.]] Even ''the other Nighloks'' considered it going too far (there was a risk that both worlds would be annihilated.)
** ''[[Series/PowerRangersLightspeedRescue Lightspeed Rescue]]''[='=]s Queen Bansheera does truly horrible things. She crosses the line when Olympius, her son, ends up stuck in the local equivalent of Hell; she opts to ''leave him there'' for being useless enough to get stuck there in the first place, and seems to take perverse pleasure in doing it, too.
** Venjix from ''Series/PowerRangersRPM'' crosses this territory when he '''''DESTROYS 99% OF HUMANITY'''''. Also when [[spoiler:he gains control of all the hybrids he experimented and hid in Corinth]] there are ''children'' among them and they don't even look a year over ten. ''Everything'' Venjix does qualifies for this trope.
*** While they are not as bad as Venjix, [[spoiler:Alphabet Soup]] crosses the line at some point, either it is when [[spoiler:kept super intelligent people, including children, imprisoned for their entire lives under the belief they've got some horrible illness that'll kill them if they step foot outside]], or when [[spoiler:they ''allowed Venjix to escape'' by not letting Dr. K install the firewall to stop the virus from spreading]] or finally when they [[spoiler:tried to ''assassinate Dr. K'' to cover up Venjix's origins]].
** ''Series/PowerRangersLostGalaxy''[='s=] Final BigBad Trakeena crossed it when she attempted to attack Terra Venture with Stingwinger '''suicide bombers'''. ''And'' she [[SinkTheLifeBoats targeted the escape pods]], too. (TheDragon, a NobleDemon even more so than Diabolico, and who trained her, tried to stop her because his MoralityPet child friend was on one. She killed him, with him refusing to resist out of loyalty.)

* ''Series/{{Revenge}}'': In season three, Daniel Grayson confirms that he is indeed his father's son [[spoiler: by shooting Emily in the stomach in a drunken rage ''not long after they get married'' and sending her over the deck of the yacht to drown. She survives, but now she can never have children]]. By the middle of the fourth and final season, he [[HeelFaceTurn proves himself far better than Conrad]] and in the process, [[spoiler:[[HeroicSacrifice dies saving Emily's life]] from a terrorist's daughter]].
* ''Series/{{Revolution}}'':
** Whatever Monroe did that turned Miles against him must have been really bad.
** Major Tom Neville crosses this in episode 11, [[spoiler: because he showed no qualms about systematically killing off all the rebels. Then when his son Jason raised reasonable human objections over this and refused to call in the air strike, Neville tried to bully him, then he beat the stuffing out of him, and disowned him]].
** In episode 17, Rachel reveals that she has no qualms about letting a boy die just so she can get her revenge against Monroe. She would even abandon Aaron to do that.

* ''Series/{{Scandal}}'':
** The episode "Happy Birthday, Mr. President" reveals via flashbacks that Hollis and Cyrus crossed this before the events of the show, because [[spoiler: Hollis killed 7 people and framed someone for it without remorse to cover up "voting irregularities", and Cyrus just shrugged it off when he was told about what happened]].
** The episode "Blown Away" ends up having [[spoiler: Becky, Huck's girlfriend, cross this. First, she has the President shot and Huck is set up as the fall guy. Now, some people, like Huck, might not see this as crossing a line. But the minute he tries to take her down, she retaliates by murdering the entire family that Huck keeps an eye on. They were as innocent as they came, which makes her irredeemably evil]].
** Olivia herself when she [[spoiler: blows up Rashad and Yasmeen's plane]] at the end of "Adventures in Babysitting."
* ''Series/TheShadowLine'': Gatehouse crosses this in the third episode. When he was introduced, it was as an ambiguous and slightly sinister character, but definitely the lesser of two evils when compared to the obviously psychopathic Jay Wratten. But then he [[spoiler:murders Andy Dixon, an innocent man set up as the FallGuy for a murder he committed, and his mother and pregnant girlfriend just to ensure no witnesses remain]], and it's clear that he's in fact a very ruthless and dangerous man. He becomes the main antagonist for the remainder of the series.
* ''Series/ShamelessUS'': Frank Gallagher is a morally reprehensible man who would rather pursue constant means of scamming people out of their money in order to feed his alcohol addiction, than to take care of his six children who are left to fend for themselves. He's done a lot of horrible things, including [[spoiler:sleeping with an underage girl]] and [[spoiler:attempting to sell one of his children for money]]. In the context of the show, however, even these actions are presented as things that he might still come back from. However, when he [[spoiler:cons a dying woman into agreeing to marry him in order to get her pension when she passes away, then conceals from her the fact that a heart transplant has become available for her, allowing her to die from her disease in order to get her money]] that is an offense that would make him irredeemable in the eyes of many viewers.
* ''Series/TheShield'': Had always played fast and loose with the moral event horizon concept with Vic Mackey, what with him shooting a fellow cop in the pilot and all. But his decision in the second to last episode to betray his only remaining friend, Ronnie Gardocki, by turning state's evidence against him and his cold proclamation that he would have no problem whatsoever LYING to Ronnie about his impending arrest, ultimately pushed Vic towards the point of no return for many fans. Even changing his mind finding out about Corrine's betrayal and [[YouAreTooLate his failed attempt to get Ronnie to go into hiding]] didn't change that the damage was done.
** Shane Vendrell from the same series had his own Moral Event Horizon moment when he murdered his best friend Detective Curtis "Lem" Lemansky, to ensure he did not turn against the Strike Team after being busted by IAD. Though the writers later tried to backpedal on this point of no return, by way of having Shane defend his actions by having Shane successfully own Vic's ass by way of lampshading Vic's own murder of a fellow police officer, for many fans it cemented Shane as the show's main villain for its final two seasons.
* ''Series/ShiningInheritance'': In this KoreanDrama, Eun Sung's stepmother is first seen as a somewhat strict, money-worried woman, but not so bad. Then, in several episodes she has [[spoiler: thrown both of her step-children out onto the streets, without giving them a penny of their newly-deceased father's life insurance, and using lack of money as an excuse while she had enough money to buy both her and her daughter a large apartment]] and [[spoiler: left her mentally disabled step-son, who she had found when lost, at an orphanage halfway outside town because she didn't want trouble]] AND [[spoiler:arranged things to her advantage, lying to Eun Sung and manipulating her and saying they should act like strangers for the sake of her reputation because if the boy her daughter liked found out she kicked Eun Sung out of the house, he might get a bad impression of her]]. Oh, did I mention this all happened in 6 or so episodes? And the woman is still proud to live?
** Also, until episode 15, Seung Mi, though not liked by a number of fans, didn't have a mob after her. Then, she [[spoiler:lied about Eun Sung's circumstances, making him think Eun Sung was a liar and con artist, even though Eun Sung had done so much for her -- and her reason was simply to not let Hwan think badly of her -- ]] this started several hundred conspiracies for her quick and painful death.
* ''Series/ShokojoSeira'': The two main tormentors of Seira in this Japanese drama, [[DeanBitterman Director]] Mimura Chieko and the AlphaBitch Maria. Seeing how they are counterparts for Miss Minchin and Lavina in ''Literature/ALittlePrincess'', it was no surprise.
** Having a huge inferior complex for Seira's deceased mother who she was classmates with, Mimura Chieko absolutely despises Seira for being [[LikeFatherLikeSon too much like her mother]] and often [[KickTheDog slaps her]] when Seira stands up to her when no one else does. She is brutally cold when telling Seira about her beloved father's death and does nothing to lessen the pain, letting Seira know right off the start that she could kick her out of the school (leaving the poor girl without any shelter or food) and does so eventually.
** Just as bad (or possibly worse), Maria is a RichBitch who likes the fact that she has control over all her classmates. But when Seira comes into the picture, she takes every effort to make her life miserable for easily stealing away her popularity. When Seira loses her fortune, she delights in making Seira grovel on the ground, donating huge amounts of money to the school and thus gaining enough power to make Seira her own personal [[strike: slave]] maid. She would also purposely spill soup on Seira and throw tomatoes at her when Seira was already at the [[BreakTheCutie lowest point of her life]]. And in a heartwrenching HopeSpot for Seira, Maria makes her believe that there was a slimmest chance that Seira could be [[RomeoAndJuliet Juliet]], something Seira has dreamed of for the longest time. Maria gets to be Juliet and forces Seira to work extra hours in the kitchen, not allowing her a chance to even be in the play.
* ''Series/{{Smallville}}'':
** ComicBook/LexLuthor has several moments of varying severity. It depends on when and how you deem someone "irredeemably evil".
*** In "Subterranean", [[spoiler:casually walking by a series of prison cells holding meteor freaks in his secret lab, codenamed 33.1.]]
*** In "Freak", [[spoiler: has his people abducting Chloe to said secret lab then experiment on and painfully humiliate her. He then swears to Lana upon his unborn child's soul that he has nothing to do with it, before watching a video of Chloe stripped half-naked and strapped to the experiment table. As she struggles, he delivers this line with a hint of PsychoticSmirk:]]
--->'''Lex''': [[spoiler: Regarding our most recent subject...keep a close eye on her.]]
*** This is especially notable for being directed by Michael Rosenbaum, Lex's actor, who has always wanted Lex to be evil.
*** TheReveal later in Season Six that [[spoiler: he drugged Lana with synthetic hormones to fake the pregnancy and deceive her into marrying him, because he wanted to take her away from Clark forever. In "Promise", ''on the day of that very wedding'', he even murders the doctor who helped with the deception, due to the man getting sick of it and threatening to tell Lana.]]
*** Killing his [[spoiler: "brother", Julian]] in "Persona".
*** [[spoiler: [[SelfMadeOrphan Killing his father]]]] in the Season Seven episode appropriately named "Descent".
*** [[spoiler: Forcing Clark and Lana into a [[TearJerker heartbreaking]] SadisticChoice that leaves them separated by a bomb's worth of Kryptonite]] in the Season Eight episode "Requiem".
** Davis crosses this when [[spoiler:he kills Jimmy in ''Doomsday''.]]
** Major Zod. Either [[spoiler:choking Faora, along with his unborn child, to death when she refuses to join him in conquering Earth]] or [[spoiler:[[KillItWithFire burning Tess]] with [[EyeBeams heat vision]]]]. In the case of the former, even he sees this as the point where he can't go back and condemns himself to the slippery slope.
* ''Series/SonnyWithAChance'': In a 2-part episode, Penelope crosses this by [[spoiler: framing Sonny for stealing, accusing her of plagarism, turning her friends against her, getting her booted off So Random, leaving Chad, Nico and Grady in a plane in a stormy sky without any parachutes]], and for the icing on the cake, [[spoiler: tries to kill Sonny with a bomb]], all this because Sonny loved Chad.
* ''Series/SonsOfAnarchy'': Jax Teller's attempt to create a permanent break with girlfriend Tara by [[spoiler: sleeping with porn starlet Ima]] served as a Moral Event Horizon for many. Regardless of his reasons or if he begs for forgiveness in the future, it's hard to believe Tara could ever forgive him. Too, while fans may be able to accept a Jax who kills people, runs guns and sometimes drugs and generally walks on the wrong side of the law, [[spoiler: blatant infidelity]] is an irredeemable act.
* ''Series/{{Spooks}}'': In series 9, we've been treated to watching [[spoiler: Lucas']] life falling to pieces as he tries to keep his shady past a secret in the face of ever-increasing blackmail from [[spoiler: Vaughn]], but he crossed the Moral Event Horizon fully in episode 6 when he [[spoiler: hangs up a 999 call when Daniella lets slip she knows about Albany, sentencing her to bleed to death as he lies about the ambulances being on their way]].
** And if that's not enough, the next episode reveals [[spoiler: he was knowingly responsible for both the bombing of a British embassy, killing 17 people, and the murder of a friend to steal their passport and identity.]] Not much chance of coming back from that....
* ''Series/StarTrekDeepSpaceNine'':
** The last episode has the Female Changeling deal with Cardassian saboteurs by nuking Lakarian City; the resulting death toll is two million. When the Cardassian fleet learns of this, they perform a HeelFaceTurn, and begin firing on the Dominion and Breen ships. How does the Female Changeling react to this?
-->'''Female Changeling''' - ''"I want the Cardassians exterminated."''
-->'''Weyoun''' - ''"Which ones?"''
-->'''Female Changeling''' - ''"All of them. The entire population."''
-->'''Weyoun''' - ''"That may... take some time."''
-->'''Female Changeling''' - ''"Then I suggest you begin at once."''
** The Dominion itself crossed the line during the Season 4 episode "[[{{Recap/StarTrekDeepSpaceNineS04E24TheQuickening}} The Quickening]]", when they infected an entire planet's population with a slow acting but ultimately lethal bioweapon, purely to discourage other worlds from resisting. This was ''after'' devastating the planet with conventional weapons.
** Gul Dukat was a mad, genocidal, sexually-ravenous dictator to begin with... and then he allied with the Dominion just to get back into a position of power, effectively setting off the chain of events that got his own planet razed to the ground.
** Admiral Leyton spends most of "[[{{Recap/StarTrekDeepSpaceNineS04E11Homefront}} Homefront]] / [[{{Recap/StarTrekDeepSpaceNineS04E12ParadiseLost}} Paradise Lost]]" as a WellIntentionedExtremist who truly believes he's doing a good thing with his conspiracy to take over Earth and put it under martial law. He even looks sorry when he frames his old protege, Ben Sisko, and has him put in a holding cell. [[spoiler:Until three-quarters through the story, the station captures another conspirator and is bringing him to Earth on the ''Defiant'' to testify. Leyton tells his right-hand-woman that the ship was taken over by Changelings and needs to be destroyed]].
** Quark comes close when he agrees to help his cousin sell weapons after his investments fall through and his debt piles up. Everyone calls him out on it and he begins to fear it himself. He stops just short, betraying his partners after they try to sell weapons to a regent who plans on killing millions
** Kodos the Executioner from "[[Series/StarTrekTheOriginalSeries The Conscience of the King]]" had murdered half the population of a colony world, picking the survivor half with [[SocialDarwinist Social Darwinism]] having convinced himself it was the only way to alleviate a famine
* ''Series/StarTrekVoyager'': The aliens in "[[{{Recap/StarTrekVoyagerS4E7ScientificMethod}} Scientific Method]]" come across as an entire civilization who crossed the MoralEventHorizon long ago and have just kept on going. They routinely do medical experiments on sentient creatures, mutilating, torturing them, and even killing them if they feel it will benefit their medical research to do so. They feel completely justified in their actions and not only do they feel no remorse or regret over their actions, they feel that what they do is noble and beneficial. Genetically deforming, maiming and killing the crew of Voyager is the NightmareFuel evidence of their crimes and ''that'' is only the tip of the iceberg. What is really terrifying is that their flimsy justifications allow them to murder entire societies with impunity and go on torturing and killing as many sentient creatures as they feel is necessary for their "research."
** Captain Ransom in easily crossed this line when he started murdering aliens as a fuel source for his ship. IDidWhatIHadToDo is nowhere near a sufficient excuse, but he at least seems to realize this at some level and eventually under goes a HeelFaceTurn and HeroicSacrifice.
* ''Series/StrangerThings'': Until this point ''merely'' a [[PoliticallyIncorrectVillain racist, homophobic]] [[TheBully jackass]], Troy proves himself to be a complete psychopath when [[spoiler:he gives Mike the SadisticChoice of jumping into the lake or seeing him cut Dustin's teeth out]]. Keep in mind, this is a huge drop, and SoftWater has been explicitly discounted - [[spoiler:had Eleven not [[BigDamnHeroes intervened]], Mike would have been dead, and Troy knew it.]] Seeing Eleven [[BewareTheNiceOnes break the little shit's arm in anger]] after that is [[LaserGuidedKarma incredibly satisfying]].
* ''Series/{{Supernatural}}'': [[spoiler:Zachariah]] used to be Jerkass-personified, even if they were ([[KnightTemplar arguably]])[[WellIntentionedExtremist well-intentioned.]] And there ''could'' be some (flimsy) [[UtopiaJustifiesTheMeans rationale]] behind their motives as presented in the Season 4 finale. But they showed that {{light is NOT good}} in the season 5 premiere, when they [[spoiler: threatened to cripple Bobby for life, removed Sam's lungs, and gave Dean Stage 4 stomach cancer, all to give Dean incentive to work with him.]] For what it's worth, [[CrowningMomentOfAwesome Dean tells them to fuck off, each and every time.]]
* ''Franchise/SuperSentai'':
** In ''Series/EngineSentaiGoOnger'', BigBad Yogoshimacritein crosses the line when he [[spoiler:shoots at the Rangers ''through'' his sympathetic subordinates Kitaneidas and Kegalesia]], resulting in their deaths. He ended up [[TheDogBitesBack shooting himself in the foot]] by doing this, however, as they hang on just long enough to destroy the source of his powers.
** ''Series/SamuraiSentaiShinkenger''. Being a half-Gedoushuu who spends much of his time in his natural human form, Fuwa Juzo is subjected to many WhatMeasureIsANonHuman topics, thinking he might make a HeelFaceTurn (he even likes Genta's sushi). His sword Uramasa is made from his family who wanted him to stop being a BloodKnight that lives in slicing people with it. Then, when Akumaro tried to use his human emotions to use Uramasa to create a HellOnEarth, Juzo instead slices him off and reveals that he prefers to be a full-blooded Gedoushuu and doesn't care one bit for his family's pleads, all he wants is to use Uramasa to give him the pleasure of killing people.
** Juzo's successor in this role is Basco ta Jolokia from ''Series/KaizokuSentaiGokaiger.'' Again the twist is that the ''expected'' twist of him really being not so bad never happens. Though presented as a traitor and villain who'll stab anyone in the back to get what he wants, he [[spoiler: usually]] has a human face, and he's a lot of fun to watch, and he even has the same gimmick as [[Series/KamenRiderDecade Daiki Kaito, aka Kamen Rider Diend]], who is a ''textbook'' JerkWithAHeartOfGold. Okay, so he's not the SixthRanger after all like we all assumed, but surely he'll show his former friends some mercy when about to strike the final blow, or realize that there are more meaningful things than serving his own greed, right? ''Right?'' Well, surprise: it turns out he's a traitor and villain who'll stab anyone in the back to get what he wants. Including [[spoiler: putting a bomb on his cute monkey-beast sidekick Sally and pushing the button, killing him[=/=]her instantly, to try to get rid of the Gokaigers]], which is the moment that ''really'' makes you hate the guy. With this, he's revealed as actually being the evilest bad guy in the series (Compare this to the ''actual {{Big Bad}}s,'' where Oiles Gil just wants to prove he's competent, Damaras is a NobleDemon, Barizorg's brainwashed, etc. Would ''any'' of them pull something like that?)
** Before that, there was ''Series/ChoujuuSentaiLiveman'' and its BigBad Great Professor Bias. To explain his Moral Event Horizon, it is important to understand how he runs his group, Volt. As of Episode 22, his students are three geniuses from Earth and two aliens, all of whose experiments he urges on with the utmost confidence. The first of the five students to go is the alien Guildos. [[spoiler: Right before his death, Guildos realizes that he is not an alien, but a robot. Bias then confirms that not just Guildos, but the other alien, Butchy, were robots created to make the Earth students work harder. Butchy breaks down at this point because he had memories of a happy life that he just learned were completely fake and that his whole life was a lie and, as Butchy starts undergoing a Heel Face Turn, Bias makes him self destruct. If you don't consider this Bias's Moral Event Horizon, then there's his motive for everything in the series: He recruited four students from Earth- one of them had already made a Heel Face Turn by Episode 22- so he can raise their "scores" to 1000 so he could extract their brains and extend his immortality. After all the care he seemed to show to his students before this was revealed, this is shocking.]]

* ''Series/TeenWolf'': Quite a few villains do pretty horrible things.
** Kate Argent [[spoiler: seduces an adolecent Derek Hale and burns down his home, killing most of his family.]]
** Because of this the first season's BigBad, Peter Hale, crosses it before the series started [[spoiler: by killing his niece for her Alpha powers.]]
** Season two's BigBad, Gerard Argent crosses it like a daily bridge - he declares a werewolf genocide on Beacon Hills, threatens to kill Scott's mother unless he betrays Derek's trust, [[spoiler: forces his son to help kill his wife for being bitten. He uses Allison's grief to turn her into an almost perfect copy of Kate. Even when he kills Matt, the Kanima master, we feel more sorry for Matt.]] In the season finale, he beats up Stiles in an effort to hurt Scott and [[spoiler: uses the Kanima to hold his granddaughter hostage - all this was an elaborate plan to become a werewolf himself to cure his own cancer.]]
* On ''Series/TheThinBlueLine'', Baz, a teenage boy is revealed to have crossed it when he forces his confused girlfriend, Natalie to throw her baby in a rubbish bin. She is at least remorseful for it, but Baz remarks "So what, who cares? It probably weren't mine anyway." [[BerserkButton This nearly causes Fowler to hit him.]]
* ''Series/TwoAndAHalfMen'': Rose, in the eyes of the characters, is seen to have crossed when it's suggested she killed Charlie. Even though [[spoiler: it ends up not to be true, faking his death and imprisoning him in her basement for four years]], trying to prompt Walden's ex-wife Bridget to become a stalker like her and becoming obsessed and romantically involved with Walden (his home's new owner) while [[spoiler: Charlie is actually in fact still alive and she knows it]] does not make it any better. If anything, only worse.
** Zoe was never the fans' favorite character regardless, but her constant badgering of Walden to get Alan out of the house, showing no remorse when Alan has a heart attack (both of them actually, whether she knew the second was fake or not), threatening him for taking advantage of Walden's kindness and then exposing to everyone through a PI that Alan faked it, thus putting a rift between him and Walden which is there until the series ends. Even if doing all those things wasn't enough, cheating on Walden off-screen while they were still together just clinches it!
** If you view the show after discovering [[spoiler: Chuck Lorre]] is an In-Verse character, he crosses by not only [[spoiler: continuing the show by writing out Charlie]], but even worse by [[spoiler: having a piano fall on Charlie as he returns home]]. Suffice it to say, [[KarmicDeath the punishment fits the crime]].

* In the original ''Series/{{V 1983}}'', Daniel Bernstein steadily becomes worse as [[LesCollaborateurs he joins the visitors]], using his newfound power for petty acts of cruelty and to threaten other people to get what he wants. He eventually kills an old woman who was spying for the resistance in the Visitor Headquarters, despite her pleas to him to let her go and how she's known him since he was a kid. The moment is portrayed as the point of no return for him, [[spoiler:and the resistance sets him up to be killed when they raid his house later on.]]
* ''Series/VeronicaMars'': In the S2 finale, it is revealed [[spoiler: Cassidy]] blew up the bus at the beginning of the season. This might have been forgiven given his FreudianExcuse, but then he blows up the plane where Papa Mars was supposed to be and just in case that wasn't evil enough, he is revealed to be Veronica's rapist from S1.

* ''Series/WalkerTexasRanger'': Most of the villains tend to KickTheDog half a dozen times before the episodes are over, but some villains ''really'' show their cruelty and cross the line. Examples:
** Lazarus, vicious and merciless killer for hire from 4-part StoryArc is already shown as cruel and remorseless assassin, killing undercover cops in a lot of violent ways and showing no remorse for it, but he really crosses this line when he kills an innocent young boy off-screen and after that doesn't feel anything.
** Johnny Blade from episode "The Lost Boys" just kept crossing the line: first he organizes the heist and kills a cop. Then he gives the gun to one of his accomplices and the same accomplice hides in his friend's house. After learning this Johnny threatens and innocent young teenager Jesse(the same friend who Johnny's accomplice hides the gun in his house and Carlos' nephew) to remain silent about his crimes and give him his gun back or else he will kill his mother. But he doesn't just stop there. Later Jesse is arrested and thought to have killed the cop and later Johnny kidnaps his mother and forces Jesse to take all the guilt guilt for his crimes and falsely confess or else he will kill his mother. But after Jesse does so, Johnny orders his lawyer and his henchmen in prison to kill Jesse, even after he took all the guilt and attempted to make his mother commit suicide. This was so evil, that judging from the look on his henchmen's faces, they seemed [[EvenEvilHasStandards disturbed by it]]. Luckily he is defeated and his accomplices are arrested.
** Recurring villain Victor La Rue is pure evil, in "The Trial Of La Rue" he takes the courtroom hostage, kills the judge, and taunts Alex. In the end, Walker kills his ass, completely skipping the typical fisticuffs beat down, opting to just shoot the fucker dead. This alone showed that Walker has seriously had enough of the bastard's shit.
* ''Series/TheWalkingDead'': Ed Peletier was certain nobody's favorite character, constantly abusing Carol and Sophia just to show his dominance. Nobody was sad when he was the first of the group to be killed off when the camp was invaded by Walkers and he was off sulking in his tent because Shane had beaten the shit of out him earlier in the day. However his MoralEventHorizon moment doesn't get revealed until the season two premier when Carol states that he was looking at his own daughter, suggesting he was ready to sexually abuse her as well.
** [[spoiler: Shane]] crosses a MEH when he shoots [[spoiler: Otis]] in the leg, leaving him to be eaten alive by walkers. If not that, then he's definitely crossed it when he [[spoiler:snaps Randall's neck in cold blood and attempts to frame the boy for attacking him, to justify it.]]
** [[spoiler: [[CreepyChild Lizzie]]]] crosses the MEH when [[spoiler: she murders her sister in order to prove humanity within Walkers still exists]], and then planned to do the same thing to Judith.
* ''Series/TheWire'': Quite a few people cross the line.
** Stringer Bell leads the pack by [[spoiler:ordering the murder of D'Angelo Barksdale in prison, then negotiating a drug deal with Prop Joe behind Avon's back at D'Angelo's funeral]].
** Walker is shown to be an all-around bastard, but crosses the Horizon when he [[spoiler:breaks Donut's fingers rather than attempt to arrest him]].
** Valchek counts. He orders an investigation into Frank Sobotka over a personal feud which ultimately leads to [[spoiler:Frank's death at the hands of The Greeks]]. Valchek doesn't seem particularly bothered when this happens, handwaving that "That's what happens when you lay down with gangsters."
** [[Music/WuTangClan Method Man]]'s Cheese Wagstaff crosses it when he [[spoiler:sells out his uncle, Proposition Joe, to Marlo Stanfield, leading to Joe's murder.]]
* ''Series/WolfHall'' portrays the execution of Anne Boleyn as one for Thomas Cromwell and Henry VIII.
** Cromwell, who until now had been a sympathetic character, uses Henry's order to get rid of Anne as an excuse to exact vengeance on the five men who played demons in a masque that disgraced the memory of his master, Cardinal Wolsey. He convicts them of high treason using hearsay, tricks, and a KangarooCourt, sending all five to the block. When it comes to Anne's death, however, Cromwell is clearly not happy with having engineered it. The last shot of the series is him [[ThousandYardStare staring blankly over Henry's shoulder]] in the realization that he's sold his soul in the service of a fickle monster.
** Henry, unlike Cromwell, has no qualms whatsoever about declaring that Anne--a woman for whom he had upended the religious authority of England in order to marry--has somehow "bewitched" him because their only surviving child is a daughter and, of course, [[UsefulNotes/ElizabethI that would ruin England]]. When Cromwell arrives to tell him that yes, Anne is now dead, Henry beams like he's just won the lottery and embraces Cromwell like a brother.

* ''Series/{{Zoey 101}}'': The Gym coaches had been major {{Jerkass}}es[[note]]Coach Phelps only appeared in one episode, "Disc Golf" in Season 1, where he forced the group to run tons and tons of laps, even saying that he would make them run loads more laps if they didn't officially make the disc golf team, but that wasn't quite worthy of crossing.[[/note]], but Coach Keller crosses it in "Wrestling" when he forces Zoey onto the wrestling team by basically ''yelling her into it against her will'' for, unbeknownst to her until the time comes, the sole purpose of using her to make boys forfeit against her in the state tournament to then get another student into the finals without tiring him out and claiming she was "injured". Needless to say, he got what he deserved when Zoey got his substitute out and was walloped big time by Chuck Javers.

* ''Series/The100'':
** Finn kills [[spoiler:several Grounder prisoners. He's sort of regretful about it, but still hates the Grounders. Eventually, he accepts his guilt and allows himself to be executed.]]
* ''Series/TwentyFour'': Several characters cross it, even when they're not intending to. In fact, an alternate name for the show could be "Moral Event Horizon: The Series". It's a very long list:
** Season 1 villains: Kevin Carroll crosses it by [[spoiler: smothering Janet York to death.]] Andre Drazen leaps over the horizon by [[spoiler: killing a hostage after Jack has already complied with his demands]], and finally, [[spoiler: if his father Victor didn't cross the horizon while he was a warlord, he most certainly crossed it by killing his friend's daughter without hesitation or remorse when Jack takes her hostage.]]
** Season 3: Ramon Salzaar [[spoiler: shooting his brother Hector for not going along with a deal.]]
** Season 4: Dinah Araz [[spoiler: coldly poisoning an innocent teenage girl.]] It's the smiling and talking over family photos [[spoiler: while Debbie unknowingly drinks the poisoned tea]] that sends her over, and though she attempts a HeelFaceTurn afterward, [[spoiler: she gets a KarmicDeath instead.]] Her son Behrooz, [[spoiler: subject of a prominent WhatHappenedToTheMouse]] follows her right across the line by still following her orders despite clearing knowing she's crossed the MEH.
** Season 5: Christopher Henderson likely already crossed the horizon before he even appeared on-screen by [[spoiler: ordering the murder of David Palmer and Michelle Dessler.]] If not, then he seemed to do so [[spoiler: via his implied murder of Evelyn Martin and her daugher.]]
** Season 6: Abu Fayed [[spoiler: detonating a nuke that kills many thousands of people]], Graem Bauer [[spoiler: either by his involvement in Day 5 or his confessed multiple attempts to murder Jack]], Philip Bauer [[spoiler: either by murdering Graem to cover his tracks or threatening to murder his grandson Josh]], and Cheng Zi [[spoiler: by torturing Audrey Heller for no other reason than to spite Jack and use her against him.]]
** Season 8: Charles Logan [[spoiler: by corrupting Allison Taylor to redeem his public image]], and [[spoiler: Yuri Suvarov, for orchestrating the day's events, particularly the murder of Omar Hassan and Renee Walker.]]
** Up until the finale of the first season, [[spoiler:Nina Myers]] seemed - at best - to be someone with muddled loyalties. Even when it was revealed in the previous episode that she was [[spoiler:Victor Drazen's contact in CTU (and was thus responsible for tipping the assassin off to the safehouse where Teri and Kim were staying)]], she still wasn't overtly bad. That changes in the span of the finale, though, when it's revealed that she [[spoiler:not only slit Jamey Farrell's wrists while the latter was handcuffed to a chair, but goes on to shoot and kill Teri Bauer (who just revealed to her that she was pregnant), despite not having any real reason to]]. Even though the writers tried to humanize her in the next two seasons, it didn't work.
** Sherry Palmer appeared to be a LadyMacbeth-esque figure who's constantly scheming behind-the-scenes to make sure her husband doesn't lose the Presidency. That pretense gets dropped when she lets Alan Milliken (who was trying to blackmail her husband) suffer a heart attack while railing at him, and then preventing Milliken's wife from administering the medicine he needs.
** For some, Mike Novick never recovered from the season 2 incident where he pushed Presidential assistant Lynne Kresge down a flight of stairs (which crippled her), then ''comforted'' her as she was being wheeled to the ambulance.
*** Well, actually Mike didn't do that himself. He just locked Lynne in a room and assigned a guard to watch her. The guard is the one the pushed her down the stairs while she was trying to escape. On the one hand, Mike did a pretty bad thing by locking her in a room so she wouldn't interfere with the plan to impeach Palmer. On the other hand, he likely had no idea something like that was going to happen to her. But yeah, the "comforting" thing still made it a lot worse...
** The show's writers had attempted to humanize Habib Marwan in Season 4, via deleted scenes that show him interacting with a wife and child who he is very caring towards. These scenes were apparently dropped when they realized that he crossed a clear line when he killed tens of thousands via a nuclear power plant meltdown, then followed it up by blowing Air Force One out of the sky and killing the majority of people aboard (including the President's son).
** According to some, even Jack has crossed this line, via his [[spoiler:execution of an unarmed (and surrendering) Dana Walsh]]. He does get called out on it by other characters, and it seems to be the moment where he's finally crossed the deep end.
*** What really makes it all the more of one for Jack was the fact that in spite of his [[GoodIsNotNice methods]] he still had a bit of a personal moral code that was always above the attitude of RevengeBeforeReason. [[spoiler: Killing Dana]] was essentially the point where he went "Screw it."
** Tony Almeida (depending on who you ask) in Season 7. Three words: [[WhamLine "I'm sorry, Larry."]]
** Additionally, many feel President Allison Taylor crossed it by [[spoiler: willingly listening to Charles Logan, despite knowing all about his past crimes and the type of man he is, and outright threatening Dahlia Hassan with military invasion of her country.]]