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''Series/TwentyFour'' does not lack [[CompleteMonster this trope]].

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* Recurring villain Nina Myers (seasons 1-3). While terrorists have the excuse of being motivated by ideology, Nina is driven by her bottomless {{greed}}. Having infiltrated CTU, Nina fed information to the Drazen terrorists to assist in their schemes, and when [[TheHero Jack's]] wife Teri Bauer overhears Nina speaking German, Nina murders her to keep Teri from connecting her to Germany. Nina assists in numerous innocent deaths and terrorist activities, even conspiring to allow terrorists to get their hands on nerve gas. Jack Bauer once summed it up best: "You're worse than a traitor, Nina. You don't even have an ideology. You don't believe in anything."
* Ramon Salazar from season 3 was a brutal psychopath of a drug dealer. Since his release from prison, Ramon killed numerous innocent people. Ramon was attempting to get his hands on a lethal bioweapon called the Cordilla virus for his own profit and when his own brother Hector caused problems for the deal, Ramon cold-bloodedly gunned Hector down, simply for a better payout for the Cordilla.
* Navi Araz of season 4. His BigBad boss Habib Marwan was ruthless, but Navi forcibly involved his innocent teenage son Behrooz in dangerous terrorist activities that took the lives of innocents, and then ordered Behrooz's girlfriend's death at Behrooz's own hand. When Behrooz proved unwilling, Navi attempted to murder him.
* Abu Fayed has the most successful body count in Season 6. Fayed shows himself as nasty by having Jack Bauer tortured and later orders the same on a computer technician with a power drill. Fayed succeeds in having a nuclear bomb detonated in downtown LA, causing at least 13,000 deaths.
* Jack's father, Philip Bauer, from season 6, was a CorruptCorporateExecutive who helped mastermind a conspiracy that reached all the way to the President, and helped have a previous president assassinated for it, with multiple innocents dying thanks to his actions. To cover his tracks he [[OffingTheOffspring murders his co-conspirator younger son]] and later sells out his country upon being discovered, annoyed at the lack of appreciation for his work. Philip's work nearly started World War 3 and he kidnapped his grandson, fully willing to kill him if the boy didn't conform to Philip's standards of Philip's legacy.

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