History SanitySlippage / LiveACtionTV

%%* ''Series/{{Dexter}}'' wrestles with Sanity Slippage during the second season of the series.

** Oona is known as being CuteAndPsycho for being a little off her rocker at times and is easily the poster child for this trope when concerning this series. "The Cherry-on-Top-inator", however, shows just how psychotic she can get, from her bloodlust of [[DropTheHammer smashing gadgets to pieces with her personal mallet]] to her dancing on the edge of sanity with each story she hears of how the titular gadget helped her co-workers. It makes one wonder if she would have gone after said co-workers with the mallet if the show weren't kid-friendly.

*** Antagonist [[MagnificentBastard Dukat]]. He starts off as a scheming, megalomaniac, yet charming villain, gets gradually worse, especially in season six, until "[[Recap/StarTrekDeepSpaceNineS06E11Waltz Waltz]]", when it all finally boils down to a deranged MotiveRant that is declared in-universe to be a MoralEventHorizon: "I should've killed every last one of them! I should've turned their planet into a graveyard the likes of which the galaxy had never seen! I should've killed them all."

* Subverted on ''Famous In Love'', actress Alexis gets her own reality TV show which is managed by Ida, mother to Alexis' friend Tangey. However, the show soon makes some bad moves that cost Alexis friends and threatens her acting career. Alexis seems to be slipping deeper into this as she's popping pills, cutting off her hair and videotaped in public playing the guitar and then arrested for breaking into a family's house. With her held at a psychiatric hospital, Ida reveals that Alexis' show has been cancelled and coldly leaves her. As soon as she's gone, Alexis sits up and, with, with friend Sloane, reveals she was faking this whole "breakdown" as the excuse to get the show canceled. The "drugs" were candy, the family whose house she "broke into" are friends of Sloane's and her "haircut" is a wig. Thrown at first, Tangey is happier Alexis is okay and congratulates her on this scheme.
** However, in a case of GoneHorriblyRight, Alexis discovers that she's under a 72-hour hold before a doctor can even see her. Meaning that it's going to be public that she spent the weekend in a mental ward which will affect her career.

* ''Series/{{Degrassi}}'': [[TroubledButCute Eli]] [[DarkAndTroubledPast Golds]][[EmoTeen worthy]] started to become this in the most recent season. First, he reasonably starts to become a little suspicious when a former bully keeps trying to talk to his girlfriend Clare, then he becomes [[CrazyJealousGuy even more possessive]] of her to the point of being controlling, and she responds by saying she needs some space and that they should take a break. How does Eli deal with this? [[spoiler: [[ManipulativeBastard He crashes his car in an attempt to get Clare back]]]] of course!

** ''Series/StarTrekTheNextGeneration'': In "Sarek", Vulcan ambassador Sarek is struggling with Bendii syndrome, the Vulcan version of Alzheimer's disease, which makes it practically impossible for him to suppress his emotions at his advanced age, and after it starts affecting the ''Enterprise'' crew, Picard finally confronts him about it and Sarek's attempts at denying Picard's assertions have him [[{{Angrish}} devolving into furious ranting]].

* ''Series/StarTrekDeepSpaceNine'':
** Antagonist [[MagnificentBastard Dukat]]. He starts off as a scheming, megalomaniac, yet charming villain, gets gradually worse, especially in season six, until "[[Recap/StarTrekDeepSpaceNineS06E11Waltz Waltz]]", when it all finally boils down to a deranged MotiveRant that is declared in-universe to be a MoralEventHorizon: "I should've killed every last one of them! I should've turned their planet into a graveyard the likes of which the galaxy had never seen! I should've killed them all."
** Faked -- ''probably'' -- by Sisko in "[[Recap/StarTrekDeepSpaceNineS05E13ForTheUniform For the Uniform]]". He even slips into the Joran [[TranquilFury voice]].
* ''Series/StarTrekTheOriginalSeries'':
** To [[TheSpock Spock,]] of all people, in "[[Recap/StarTrekS2E1AmokTime Amok Time]]" when the [[MateOrDie Pon Farr]] Blood Fever hits him. He begins by just [[ForgetsToEat going off food]] and being a bit more reclusive than usual. He manages to hide his condition well enough that [[TheNotLoveInterest Kirk]] doesn't even realise there's anything wrong. Then he threatens to snap [[VitriolicBestBuds Dr Mc Coy's]] neck when the latter gets worried about him and tries to give him a medical checkup. He begins to lose his temper - quite violently, at times, alarming his crewmates. Then Jim finds out that Spock has been giving orders to redirect the ship to Vulcan, and doesn't even remember doing it. Things begin to go rapidly downhill from there, culminating in a DuelToTheDeath with Kirk where the stoic, pacifist, loyal Vulcan is reduced to the state of a wild animal, fully willing to murder his dearest friend. Fortunately, Kirk's apparent 'death' at his hands shocked him out of the Blood Fever, and by the end of the episode, he seems to be returning to normal (though not quite all the way there.)
** In "[[Recap/StarTrekS2E23TheOmegaGlory The Omega Glory]]," after Tracey learns all his evil deeds are AllForNothing, you can see him snap at the news and proceeds to threaten Kirk for weapons for a pointless fight on a planet they by now can leave any time.
** The ''very next episode'', "[[Recap/StarTrekS2E24TheUltimateComputer The Ultimate Computer]]", when Richard Daystrom attempts to convince the M-5 Computer to stand down after it has killed numerous crewmen on various ships, the fact that his creation, and by extension him, has done this weighs so heavily on him that he snaps, first ranting about how his colleagues laughed at him and took his work to make their own careers, then snapping at Kirk and declaring the two of them invincible at how powerful it becomes. Spock is forced to Nerve Pinch him before he brings harm to Kirk.
* ''Series/StarTrekVoyager'':
** In "[[Recap/StarTrekVoyagerS6E9TheVoyagerConspiracy The Voyager Conspiracy]]," as Seven's cortical node degrades, she slips further into her delusions that everything around her is part of a giant conspiracy.
** Captain Janeway is usually at her best when she's under pressure. The episodes "[[Recap/StarTrekVoyagerS4E8YearOfHell Year of Hell]]" and "[[Recap/StarTrekVoyagerS5E25S6E1Equinox Equinox]]," however, show us what she becomes when she's pushed past her limit, and the result is more than a little unsettling.

** Antagonist [[MagnificentBastard Dukat]]. He starts off as a scheming, megalomaniac, yet charming villain, gets gradually worse, especially in season six, until "[[Recap/StarTrekDeepSpaceNineS06E11Waltz Waltz", when it all finally boils down to a deranged MotiveRant that is declared in-universe to be a MoralEventHorizon: "I should've killed every last one of them! I should've turned their planet into a graveyard the likes of which the galaxy had never seen! I should've killed them all."

** Season seven does this to [[spoiler:Sam across most of the season,]] culminating in ''The Born-Again Identity''.
** Also happens, during season seven, to [[spoiler: Cas, when he absorbs all of the souls of Purgatory]] and later on, when he [[spoiler: is possessed by the Leviathan]].
** After getting the Mark of Cain, Dean has become unstable and enjoys killing versus before when he would show remorse about it, and feels absolutely no regret about it. He even tells Sam that they do things his way and it's not a team anymore but a dictatorship. Culminates in him attacking Gadreel while growling at the end of "Stairway to Heaven."