BEWARE OF SPOILERS. Due to the nature of the show, with its many Walking Spoiler characters, twists, and turns, the only spoilers whited out are those for the current season "24: Live Another Day". Proceed with caution!
The Drazen Syndicate
The Drazen Family
A Serbian warlord and mercenary who was supposedly killed along with his wife and daughter prior to Day 1 in a covert military action named Operation Nightfall. During the events of Day 1 (the two-year anniversary of his "death"), Drazen and his sons led a personal vendetta against Jack Bauer and David Palmer, the men who respectively led and authorized Operation Nightfall.
- Bad Boss: Victor isn't above sacrificing his own men or outright killing his friends if they inconvenience him.
- The Bad Guy Wins: Though he failed to kill Jack, Kim, and Palmer, and got himself and both of his sons killed (thus leaving his entire family dead), Victor wound up having one huge success when his Mole in CTU killed Teri, which completely changed Jack's life for the worse and would haunt him for the rest of his life, as well as begin the Trauma Conga Line that Jack would suffer for the rest of the series.
- Beard of Evil: A Van Dyke.
- Big Bad: Of Day 1. Despite being incarcerated prior to the events of the story arc, he is revealed to be the mastermind of a terrorist conspiracy which serves as the driving force behind the season's events.
- Disc-One Final Boss: For the first season finale. Despite being the Big Bad of the entire season, he dies less than halfway into the finale, while Nina Myers takes center stage as the final antagonist of the season, with Jack rushing to stop her before she escapes CTU and the country.
- The Dreaded: Even hardened killers like Ira Gaines are terrified of him.
- Even Evil Has Loved Ones: He loves his family dearly. Everyone else, not so much.
- Evil Old Folks: As the patriarch of the Drazen family, age has not softened him.
- Face Death with Dignity: After losing both his sons and realizing how badly he's pissed off Jack, Victor stops surrendering and calmly accepts his fate.
- The Man Behind the Man: To his sons, and Andre in particular.
- Revenge Before Reason: Victor really should have just gotten out of the country rather than wasting his time chasing Kim around to use as bait.
- Shoot the Hostage: Drazen shows how much of a monster he is by shooting his friend's daughter (whom Jack had taken hostage) when there was absolutely no need to do so, simply because he didn't want to deal with a hostage situation.
- Villains Want Mercy: He actually attempts to surrender to Jack when he's cornered and out of ammo. It takes him about five seconds to realize Jack's not in any sort of merciful mood anymore, so he closes his eyes and prepares to be finished off.
The eldest son of Victor Drazen, and very much the acting Big Bad until his father is released from prison.
- Badass Bookworm: Was an engineer before joining the Serbian Army.
- Bad Boss: So much that Gaines, himself a Bad Boss, chose to be killed by Jack rather than face Andre's wrath. Gaines' own Dragon, Kevin Carroll, didn't seem to realize this and tried to take Gaines' place and negotiate with Andre, though Andre reveals his backup plan was already in effect and has his brother Alexis kill Carroll along with Gaines' surviving Mooks.
- Bald of Evil
- Deadpan Snarker
- The Dragon: To his father.
- The Dreaded: Along with the rest of the Drazens, other terrorists and criminals are afraid of him.
- Even Evil Has Loved Ones: Andre loves his family, and is still haunted by his sister's death.
- Faux Affably Evil: Moreso than the rest of his family, Andre is able to keep up a polite facade.
- Four Eyes, Zero Soul: He wears a thin pair of spectacles.
- The Heavy: For most of Season 1. During most of the story arc, he serves as the leading agent of his father's plot to exact vengeance on Jack Bauer.
- Kick the Dog: Murders an unarmed man in cold-blood when he had nothing at all to gain from it simply to spite Jack.
- Manipulative Bastard: Although he's not the Big Bad, Andre is the string-puller who sets most of the events of Day 1 in motion.
- Pragmatic Villainy: Andre desperately wants revenge, but he sees the sense of abandoning the plan to escape America with his father so they could fight another day.
- Revenge Before Reason: Though towards the end, Andre starts to see reason and tells his father Victor they should flee the country, only for Victor to play it straight and try to lure Jack into a death trap, which leads to Jack killing them both.
- Sibling Yin-Yang: Though they are both villainous terrorists, Andre is presented as a bookish and (usually) soft-spoken type, while Alexis is the suave Dumb Muscle of the family.
- Villainous Breakdown: Suffers a brief one after his brother Alexis dies in front of him and his father Victor, and tries to kill Kim before being stopped by Victor, who reminds Andre that they still need her.
The younger brother of Andre Drazen and son of Victor Drazen.
- The Brute: Of the Drazen family.
- Cool Shades: He wears some nifty shades when executing Kevin Carroll.
- Dumb Muscle
- Even Evil Has Loved Ones: He is devoted to his father and brother.
- Karmic Death: He's murdered by the woman he was exploiting.
- Revenge Before Reason
- Sibling Yin-Yang: Alexis is a suave Dumb Muscle, while his brother Andre is more bookish and soft-spoken.
- The Unfought: Despite being built up as a major villain and a formidable assassin, he is stabbed by Elizabeth Nash long before he has a chance to kill Palmer, and dies without having fought any major protagonists.
A terrorist working for the Drazen family. Gaines hires Mandy to blow up the aircraft with photographer, Martin Belkin, aboard and masterminds the plot to kidnap Teri and Kim Bauer and assassinate David Palmer.
- Affably Evil: Gaines is remarkably likable, acting in a reasonable and professional matter even when carrying out a plan to assassinate a senator. He isn't openly sadistic, he keeps his word and even banters with Jack and admits his mistakes.Jack: Then why did you bring my family into this?Gaines: That might've been a mistake. They wanted to make it personal.
- Bad Boss: One of his defining moments is shooting a Mook in the head to show him what "dead" was, after it turned out Janet York wasn't quite dead. He was also on the receiving end of this (which he was very aware of), which is why he forced Jack to kill him rather than face the wrath of the Drazens for failing to kill Jack and his family along with Palmer.Gaines: You're either dead or you're not, there's no such thing as "sorta" dead.
- Better to Die than Be Killed: Forces Jack to kill him so he won't have to face the Drazens.
- Berserk Button: Don't lie to him, Dan found this out the hard way.
- Cold Sniper: When fighting Jack, he engages in a sniper battle with him in the woods. He was also a sniper in the Navy SEALS.
- Deadpan Snarker: One of the better snarkers from the 24 villain roster.Gaines: Bury your friend.Rick: (shocked) Where?Gaines: (annoyed) In the ground.
- Disc-One Final Boss: See What Could Have Been, as he's the head of the plan to kidnap Jack's wife and daughter, and is killed in an apparent final confrontation halfway through the season.
- The Dragon: For the Drazens.
- Friendly Enemy: He doesn't seem to hate Jack or bear him any ill will. He's just doing a job, and even wishes Jack luck.
- Graceful Loser: He accepts his defeat rather well, telling Jack that kidnapping his family was 'a mistake'.
- I Have Your Wife: And your daughter.
- Nerves of Steel: A former Navy SEAL who seems to lack fear (except when faced with the Drazens).
- Oh, Crap!: When he realizes that Jack has the advantage."Bauer's been listening... to every damn word!"
- Private Military Contractors: He's a mercenary.
- Punch-Clock Villain: Gaines just wants to get paid, that's all.
- Starter Villain: For the entire series.
- Suicide by Cop: Does this because he thinks the Drazens would do worse to him. And they DID worse to his Dragon Kevin Carroll.
- Surrounded by Idiots: Gaines' plans would've worked if it weren't for the idiocy of some of his compatriots, in particular Dan Mounts whose employment he eventually terminates.
A former DEA agent who worked for Ira Gaines during Gaines' attempted assassination of Senator David Palmer. He impersonated the deceased Alan York, father of Kim Bauer's friend Janet, so that he could kidnap Teri Bauer.
- Asshole Victim: After murdering a helpless teenage girl in her hospital bed, you'll be more than happy to see him die by the time Alexis finishes him.
- Character Death: Alexis Drazen kills him after Gaines' failure.
- Deadpan Snarker
- Dead Person Impersonation: What tips the audience off is that Alan's actual daughter doesn't recognize the man who claimed to be her father. He is also implied to be the one who alerted Gaines that Janet was in the hospital, prompting Gaines to execute Dan for lying that he and Rick killed Janet.
- Defiant to the End: When Alexis goes to shoot him, Kevin spitefully tells him to go to hell.
- Dirty Cop: During his time in the DEA.
- The Dragon: For Ira Gaines. He tries to become Dragon Ascendant after Gaines' death, but the Drazens have no interest in employing him any longer.
- Evil All Along: He poses as Alan York for a time before being found out.
- Evil Counterpart: To Jack in some ways. Initially, he seems to be a concerned father going to extremes to find his daughter like Jack wanted to save his own daughter. Still, he turns out to be an impostor and the real Alan York died before the series premiere. Also while Jack is a Hot-Blooded Federal agent willing to inflict pain on anyone if he has to, Carroll brags his famous quote seen in the caption with his character photo seen here. In addition, Kevin Carroll is played by Richard Burgi, who was originally cast as Jack Bauer before they decided to ask well-known actor Kiefer Sutherland instead. Burgi ended up playing who we thought to be the father of the best friend of Jack's daughter, only to turn out to be an imposter and one of the terrorists.
- Manipulative Bastard
- Private Military Contractors
- Screw This, I'm Outta Here!: He abandons Gaines and flees when CTU reinforcements arrive. However, he still meets his end soon afterward, courtesy of the Drazens.
- You Have Failed Me: When Jack escapes with his family, the Drazens punish Kevin for his failure by having him killed.
A not-too-bright friend of Dan Mounts who helped kidnap Kim for Ira Gaines. He later grew a conscience.
- Guilt-Ridden Accomplice: To Dan Mounts and later Ira Gaines.
- HeelFace Turn: As he's confronted with the reality of his actions, Dan's sadism and Gaines' ruthlessness, Rick feels terrible and tries to make amends by helping Kim escape.
- Honey Trap: For Kim.
- My God, What Have I Done?: Realizes bringing Kim to Gaines was a pretty bad thing to do.
- Token Good Teammate: Of Gaines' crew. He's shocked by Dan's casual violence and tries to convince him not to murder Janet.
A young man working for Ira Gaines, who kidnaps Kim with help from Rick Allen. He's just as dim as Rick, but more sadistic and careless.
- Asshole Victim: He's such a cold-hearted sadist that you want to cheer when Gaines introduces his gun to Dan's face.
- Character Death: Gaines shoots him in the head as punishment for letting Janet York live.
- Honey Trap: For Janet York.
- Jerkass: Dan is a sadistic bastard, treating his kidnap victims with disdain while enjoying the power he holds over them.
- Smug Snake: He seems to have fooled himself into thinking he's a vital part of Gaines' criminal operation, as opposed to an incompetent moron.
- Too Dumb to Live: As Ira Gaines points out, he should have known whether someone was dead. He pays for his mistake with his life.
- You Have Failed Me: For letting Janet York get away, out of a mistaken belief that she's dead.
One of the mercenaries working for Ira Gaines.
An assassin hired by Ira Gaines to kill David Palmer.
- Cold Sniper: How he operates.
- Karma Houdini: After his attempted assassination on David Palmer, Matijevich disappears entirely without facing any consequences for being the triggerman.
- Professional Killer: He's professional to the point of getting extensive plastic surgery to complete his mission.
- The Sociopath: Matijevich seems to be absent of emotion, killing ruthlessly without hesitation.
- The Stoic: Never shows a hint of emotion.
Ted Cofell (Borvo Sobrinna)
The CEO of Cofell Enterprises, an investment firm in Burbank at 21500 Riverside Drive. Serbian by birth, he was planted in America by the League of Communist Yugoslavia to infiltrate the U.S. financial community. He was a secret financial supporter of Andre Drazen and his mercenary crew with ties to Kevin Carroll.
- All There In The Manuel: His backstory and his connections to the Drazen's is expanded in the 24: The House Special Subcommittee's Findings
- Bitch in Sheep's Clothing: Seems to be a polite and decent man, until he drops his disguise.
- Corrupt Corporate Executive: Being this is his entire mission — he founded his company with the express purpose of funding the USA's enemies.
- Driven to Suicide: Cofell refuses to take his heart medication, spitting it out so he can die.
- Evil Sounds Deep: After he switches to his natural Serbian accent, his voice drops to an almost demonic growl.
- Knight Templar: He's utterly dedicated to the Drazen family and is perfectly willing to die for them.
- The Mole: For the Drazen family and the League of Communist Yugoslavia.