History OmnicidalManiac / LiveActionTV

** Dukat, as the avatar of the Pah Wraiths in the series' GrandFinale "[[Recap/StarTrekDeepSpaceNineS07E25E26WhatYouLeaveBehind What You Leave Behind]]", gloatingly [[JustBetweenYouAndMe announces his long-term plans]] to Sisko: he and the Pah Wraiths intend to create a universe of fire, purging all life and destroying everything. He thankfully doesn't get any further than bragging about it.

** ''Series/KamenRiderGeats'': [[spoiler:The Desire Grand Prix goes from a typical battle royale game involving fighting Jyamatos to protect innocent people into a full-blown SadistShow under [[BigBad Suel's]] management]], going so far as to satisfy his audience's bloodlust by causing widespread death and destruction, from ranging giving players [[DownerEnding bad endings]] as prize for clearing the game to outright turning unwilling civilians into Riders against their will, and having them outright killed if they refuse to participate in the final stages of the show.]]

** The Thirdspace Aliens from ''[[Recap/BabylonFiveFilm02Thirdspace Thirdspace]]'', evil telepathic creatures powerful enough to frighten the damn Vorlons, are described as "anti-life itself", bent on destroying everything in both their universe ''and'' our universe.

* The Thirdspace Aliens from ''Series/BabylonFive'', evil, psychotic, telepathic creatures powerful enough to frighten the damn Vorlons, are described as "anti-life itself" bent on destroying everything in both their universe AND our universe.
** Shadows seem like this at first but the reality turns to be a bit murkier.
* The Cylon [[BigBad Cavil]] in ''Series/{{Battlestar Galactica|2003}}'' is practically one of these. He's tried to kill off all of humanity by destroying Twelve Colonies (with an over 99.9% success rate) and most of his own race (five out of eight models, [[CainAndAbel succeeding with at least one of them]]).

* From ''Series/StarTrekTheOriginalSeries'', there's [[spoiler: Matter!Lazarus]] from "The Alternative Factor". In order to kill his enemy, [[spoiler: his Anti-Matter double]], he has to cross the threshold into the other universe, but bumping into said enemy while in the same universe will destroy both universes. Despite knowing this, he's so far gone that he simply doesn't care.
** Nomad from "The Changeling" also qualifies, although it became this way completely by accident: An earth probe that was programmed to seek out new life collided with an alien probe that was programmed to collect and sterilize soil samples. This somehow resulted in the two of them merging to form a new probe with the directive to [[AIIsACrapshoot seek out and sterilize all life]].

** Dukat, as the avatar of the Pah Wraiths in the series' GrandFinale, gloatingly [[JustBetweenYouAndMe announces his long-term plans]] to Sisko: he and the Pah Wraiths intend to create a universe of fire, purging all life and destroying everything. He thankfully doesn't get any further than bragging about it.
** In one ''Film/JamesBond'' inspired holo suite episode, the BigBad's plan was to cause gigantic earthquakes at certain points along the globe, killing almost everyone except a select few he has decided to save, to rebuild humanity.
* ''Series/StarTrekDiscovery'': The BigBad of Season 2, [[spoiler: Section 31's [[AIIsACrapshoot Control AI]]]], intends to wipe out all sentient life in the galaxy because it views itself as superior to everything else.
* ''Series/StarTrekPicard'': This is what became of [[spoiler:the Borg Queen]] as they were [[spoiler:[[GoMadFromTheIsolation driven mad from being cut off from the Collective]] when Admiral Janeway's neurolytic pathogen ravaged the Borg Collective and her own self. She decided the best way to protect herself is to capture Starfleet, turn its young crew into drones that could give birth to an endless supply and burn the rest of the universe so she'll never get hurt again]].

** The Daleks, omnicidal mutants in tanks who are the Doctor's collective archenemy. Their entire purpose for being is to eliminate everything in the universe, and on occasion the ''multiverse'', that is "non-Dalek" on the basis of their own supposed genetic superiority. Their creator, Davros, learned the hard way that this logically includes him as well.
** The Daleks' creator, Davros, never quite attempted this in the classic series, but remarked that he would have if he had the power — [[ForTheEvulz simply because he]] ''[[ForTheEvulz could]]''. In the revival episodes [[Recap/DoctorWhoS30E12TheStolenEarth "The Stolen Earth"]] and [[Recap/DoctorWhoS30E13JourneysEnd "Journey's End"]], this pretty much sums up why he tries to destroy ''all of reality'' — because he ''can''. It should be noted that, though he will survive along with the Daleks, he still overlooks that they'll eventually kill him too once the bomb has done its job. (Later on, he comes to accept it with a twisted "boys will be boys" fondness.)

** Davros never quite attempted this in the classic series, but he would have if he had the power — [[ForTheEvulz simply because he]] ''[[ForTheEvulz could]]''. In the revival episodes [[Recap/DoctorWhoS30E12TheStolenEarth "The Stolen Earth"]] and [[Recap/DoctorWhoS30E13JourneysEnd "Journey's End"]], this pretty much sums up why he tries to destroy ''all of reality'' — because he ''can''. It should be noted that, though he will survive along with the Daleks, he still overlooks that they'll eventually kill him too once the bomb has done its job. (Later on, he comes to accept it with a twisted "boys will be boys" fondness.)