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!
Civilians & Jack's Allies
Patricia 'Patty' Brooks
David Palmer's campaign staffer played by Tanya Wright. She is sexually attracted to David through the day, but remains reticent. Sensing this, David's wife Sherry Palmer decides to utilize Patty as a spy with the incentive of giving her tacit approval for Patty to pursue an affair with David. However, when Patty begins to make sexual advances toward David he realizes what the scheme is and fires Patty.
Rick Allen's girlfriend.
One of Kim Bauer's high school friends. She and Kim sneak out of their houses to meet with two guys, Dan Mounts (Janet's boyfriend) and Rick Allen, who are actually kidnappers. They drug Janet with rohypnol, break her arm, and eventually leave her for dead after she is hit by a car. She is eventually murdered in her hospital bed by Kevin Carroll, the man who impersonates her father.
- Butt-Monkey: Kidnapped, arm broken, hit by a car, and finally killed in hospital.
- Chew Toy: Anything too horrible to happen to Kim happens to Janet.
- Cruel and Unusual Death: Kevin Carroll smothers her with her own oxygen mask by forcing it to her face and cutting off the air supply to it.
- Death by Sex: She sleeps with Dan not long after meeting him, and of the two kidnapped girls Janet is the one to die.
- Famous Last Words / Wham Line: "Who are you? Where's my father?" This is what exposes the man we thought was her father as an imposter, but only to the audience, as the imposter, later revealed to be named Kevin Carroll and The Dragon to Ira Gaines, smothers her to death and nobody can stop him.
- Forgotten Fallen Friend: Despite being Kim's best friend, she never gets mentioned again after her murder. Heck, the last she knew Kim saw her being hit by a car, but she never even asks anyone what happened after that!
- Mauve Shirt: Janet exists mostly to endure horrible punishment and eventually die to show how serious the kidnappers are, not to mention expose 'Alan York' as Kevin Carroll.
A member of David Palmer's campaign team. She's also in a relationship with Alexis Drazen, while ignorant of who he really is.
The warden of Saugus Detention Center, a government black site under the purview of The Department of Defense.
- Death by Pragmatism: Justified, as even though he follows just about all of Jack's advice, it ultimately just isn't enough in the end.
- Mauve Shirt: He doesn't make it very far, though his death actually has a fair bit of effect on Jack.
- Nice Guy: Jack and him start getting along almost immediately.
- Reasonable Authority Figure: Jack pegs him as a straight-shooter, and he takes most of what Jack says on faith despite having little info about the situation at hand.
- Sacrificial Lamb: When the Drazen Syndicate storm Sangus and Jack takes Victor Drazen at gunpoint, Andre Drazen takes DeSalvo hostage and tells him he will kill him if he does not let Victor go. Despite DeSalvo telling Jack not to do it, Jack relents, only for Andre to murder DeSalvo anyways.
A young woman who gets caught up in the events of Day 2 after she begins to suspect her sister's fiance might be connected to terrorists.
- Action Survivor: One of only three of Jack's romantic partners to survive the show (the other two being Diane Huxley, and Marilyn Bauer), and the only one aside from Audrey and Nina Myers to appear in multiple seasons.
- Amicable Exes: While the conversation between her and Jack in Day 3's opening is awkward, there isn't too much acrimony. The two still project some care for each other, with Jack apologizing for how he ended things and Kate revealing that she missed him. It's strongly implied that it was Jack's obsession with his work, more than anything, that led to their breakup.
- Cain and Abel: The Abel to Marie's Cain.
- Demoted to Extra: After appearing prominently in season 2, she makes one brief appearance in the 3rd season and is never seen again.
- Properly Paranoid: She was right to think that there were strange dealings going on in her family's business, she just guessed they were coming from the wrong person.
Kate and Marie's father, a businessman whose assets are supposedly being used to fund terrorists.
- Red Herring: His (would-be) son-in-law suspects him, but neither of them knows that his daughter Marie is responsible.
The fiance of Marie Warner.
- Domestic Abuse: On the receiving end.
- Killed Offscreen: Gary killed her and stuffed her in the trunk of his car.
- What the Hell, Hero?: She calls Kim out for trying to take Megan the first time... in spite of being the one to tell her to take Megan and scram before her father did something in the first place.
An intelligence agent from a Middle Eastern country during Day 2.
- Character Death: He's beaten to death by racists.
Alex Hewitt-.Played By: Rick D. Wasserman
The computer hacker who created the Cyprus recording. He highly nervous.—-
The wife of Alan Milliken, one of President David Palmer's most important and influential backers.
- Character Death: Julia kills herself rather than go to jail.
- Despair Event Horizon: Sherry leaving her to take the full rap for her husband's death drives her over the edge, as does Wayne's minimal communication with her shortly thereafter. Unfortunate in the latter case, in that Wayne was avoiding conversation because he was too busy attempting to confront Sherry at the time.
- Driven to Suicide: After killing Sherry, Julia shoots herself.
- MayDecember Romance: With the much older Alan Milliken.
- Taking You with Me: Refuses to let Sherry talk her way out of the situation, this time.
- Your Cheating Heart: She cheated on her husband with Wayne Palmer.
A private investigator who assisted Wayne Palmer in breaking into Sherry Palmer's home to look for the medicine prescription bottle that would incriminate her in the death of Alan Milliken during Day 3.
Audrey's ex-husband, a British businessman.
- Butt-Monkey: Tortured by the man his wife left him for, discovers he is Marwan's Unwitting Pawn, tortured again by the bad guys, gets shot and paralyzed and finally dies because Jack forces the medical staff to save a man with critical info instead of him.
- Fire-Forged Friends: Briefly becomes this with Jack. They start off antagonistic (mostly on his end, as he's still registering the notion that his wife is moving on with someone else in her life), but they develop a bond as they attempt to retrieve Marwan's files and are forced to fight back against the Mc Lennen-Forster mercenaries.
- Heroic Sacrifice/Taking the Bullet: He takes a bullet that was meant for Jack, which eventually contributes to his death later on.
- The Needs of the Many: The final factor leading to his death. Jack needs an informant to survive a gunshot wound to discover Marwan's location from him, since if Marwan succeeds it means the deaths of millions. Sadly, this means forcing the doctors to work on the informant instead of Paul, and despite Jack's best attempts to stabilize him on his own, he fails and Paul flatlines.
- Took a Level in Kindness: He's not necessarily a bad guy when we first see him, but he does come off as short-sighted in his view of his and Audrey's marriage and antagonistic toward Jack (though that's justified in that he had only just found out that Audrey was seeing someone else). Whatever the case, he seems to become a lot more receptive to Audrey's needs during the day's events, and he develops a great admiration for Jack after they work together.
- Unwitting Pawn: To Marwan.
- Working with the Ex: Though he hadn't realized that Audrey considered them "finished" by this point, instead assuming they were taking a break to work things out.
- Character Death: She's poisoned by Dina Araz.
- Locked Out of the Loop: Behrooz's parents disapprove of his relationship with Debbie because they worry about her breaking this. When they fear that she witnessed something critical to their plans, they have her killed before Behrooz can move her to safety.
- Maligned Mixed Relationship: With Behrooz.
- Sacrificial Lamb: Her death serves two purposes. The first is to show that Behrooz's parents aren't screwing around. The second is for her death to cement Behrooz's decision in not wanting aid Marwan's cause.
- Starcrossed Lovers: With Behrooz, although she doesn't exactly realize it.
An old classmate of Chloe O'Brian and computer programmer working in Los Angeles during Day 4.
- Butt-Monkey: Things do not fare well for this guy. His coworkers are all killed, his mother is murdered as well, he spends a whole episode being held hostage by Kalil Hasan before his associates beat him half to death, and Jack barely saves him in time, but even then he's last seen in critical condition. Worse, the reason Jack let him remain a hostage, to trail Hasan back to where Audrey and her father were being held, ended up being pointless as Hasan realized he was being followed and killed himself, so Jack let Andrew remain prisoner and almost let him die all for nothing.
The older, psychiatrist boyfriend of Kim.
- MayDecember Romance: He's much older than Kim.
Jack's girlfriend at the beginning of Day 5.
The teenage son of Diane Huxley.
- It's All About Me: He's mostly concerned with how Diane dating Jack affects him.
- Jerk with a Heart of Gold: Sure, he's an enormous prick but he does love his mother and is only really guilty of being a teenage dickhead.
- The Load: Derek only seems capable of being a detriment to everyone around him.
- Mama's Boy: He's very close to his mother, and resents Jack for dating her.
The regional director of the Islamic-American Alliance, an advocacy group for Muslims living in the United States, during Day 6.
- The Mole: For the FBI, within the detention centre.
Neighbor of Ahmed Amar, who eventually is forced to a make a deliver in his place when his family is held hostage.
- Big "NO!": His Famous Last Words.
- Butt-Monkey: Spends most of his screen time getting pushed and ordered around by terrorists against his will just to protect his family. And then he finds himself at ground zero of a nuclear explosion.
- Character Death: He's killed when the nuclear bomb detonates.
- No Good Deed Goes Unpunished: Ray helps his seemingly harmless neighbor Ahmed, understanding that not everyone with a vaguely Middle-Eastern name is a terrorist. Unfortunately, Ahmed is a terrorist who takes his entire family hostage and forces Ray to carry out acts of terrorism for him, ultimately culminating in Ray's death.
Assad is a well-known terrorist with a history of hate of the West spanning 20 years but by Day 6, he has decided to renounce violence and open negotiations.
- Good Is Not Nice: Assad's HeelFace Turn did not diminish his ruthlessness.
- Hero with Bad Publicity: Assad dies saving Wayne Palmer from a bomb but he is blamed for it rather than risk the administration getting humiliated by the fact that this was plotted from within. His people will see him as a great hero who pretended to surrender to the West as part of his plan to assassinate the President.
- Off with His Head!: Assad personally decapitated two of Curtis' comrades.
- Reformed, but Rejected: Assad isn't trusted despite turning over a new leaf.
- Tragic Hero: Assad's pursuit of peace comes to nothing after he is killed saving someone who is supposed to be his enemy.
- Turn Coat: How he is seen by his people.
- Your Terrorists Are Our Freedom Fighters
Carlton 'Carl' Benton
An ex-special forces friend of Jack.
- The Atoner: For torturing an innocent civilian to death due to bad intel.
- Heroic Sacrifice: Carl steps off a landmine when Dubaku gets near, killing himself in the process.
- Retired Badass: He's given up his life in the Special Forces to take care of children in Sangala.
- Taking You with Me: He attempts to do this with Dubaku, but Dubaku survives.
The former prime minister of the African nation Sangala who helps Jack to find Dubaku.
Dubaku's innocent girlfriend who is unaware of his true identity.
The girlfriend of Roger Taylor.
- Character Death: She's killed by Brian Gedge.
James 'Jim' Ricker
The parole officer for Kevin Wade.
- Character Death: He's murdered by Dana Walsh.
- Determinator: Very little gets in his way, and it's his determination that leads to Dana deciding to kill him.
- Hero Antagonist: Prady is just doing his job, he just has the misfortune of tangling with Dana.
- Reasonable Authority Figure: All Prady wants is to do his job correctly, and he's not out to ruin anyone's life.
A member of the Serbian mob who assisted Jack Bauer's personal mission to stop the assassination of President James Heller during Day 9.
- Bald of Awesome: Seemingly shaved bald.
- Friendly Sniper: Belcheck is a very efficient and deadly sniper, but also a loyal, trustworthy friend.
- I Owe You My Life: It's implied that Belcheck's loyalty to Jack is because Jack saved Belcheck's life at one point.
- Only One Name: In his own words:Heller: So what's your name?Belcheck: Belcheck.Heller: 'Belcheck' what?Belcheck: Just one word. Like Madonna.
- Private Military Contractors: Recruited by Jack when he was hiding in mainland Europe.