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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 24: Live Another Day. Proceed with caution!

Note: Character profiles are listed under the job title they hold currently or held upon their dismissal/death.

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Regional District Director (Los Angeles)

    George Mason 

  • Heroic Sacrifice: He takes Jack's place as the one to pilot the plane with the nuclear bomb to detonate safely away from poplulated areas, as he was already dying from Radiation Poisoning.
See CTU Director/Special Agent in Charge (Los Angeles).

    Ryan Chappelle 

Ryan Chappelle

https://static.tvtropes.org/pmwiki/pub/images/chappelle_ryan_5874.jpg
"I'd like nothing more than to hang you as a traitor and watch you jerk until you're dead. But I'm a realist."
Played By: Paul Schulze

The Regional Division Director of CTU. At various points in Days 1, 2, and 3, he assumed control and often bogged down operations with a heavily bureaucratic and inflexible style of management. He was shot and killed by Jack Bauer during the events of Day 3, under the request of Stephen Saunders and order of President David Palmer. His high-ranking position was eventually filled by Bill Buchanan.

  • All There in the Manual: A tie-in book for Day 1 reveals that Chappelle does actually have a wife and children, which makes his decision not to contact them before his death even more tragic.
  • Bad Boss: Primarily this in Day 2. His actions even led to Jack being unable to save a suspect causing him to bleed to death from a head injury.
  • Death Equals Redemption: He was a pretty unlikable character throughout his appearances, until he was ordered to be killed. Although he did try to escape at first, he quickly snapped out of it, and allowed himself to die, showing that deep down, he was a good guy.
  • Due to the Dead: His sacrifice was honored with a silent clock.
  • Face Death with Dignity: In spite of being scared, he ultimately allowed himself to die.
  • He Knows Too Much: The reason why his death was ordered.
  • Heroic Sacrifice: Despite every effort to avoid such an outcome, Ryan eventually allowed himself to be killed by Jack so Saunders wouldn't retaliate.
  • Jerk with a Heart of Gold: Ryan was an abrasive, short-tempered asshole who frequently ignored the advice of his underlings and was quick to punish. That said, he was somewhat sympathetic to Jack about his family's kidnapping during Day 1 as well as Tony and Michelle during their plights in Day 3, and allows Tony to bring suicide pills to hotel guests infected by a deadly (and extremely painful) pathogen.
  • Obstructive Bureaucrat: Ryan's adherance to red tape often hindered CTU more than they helped.
  • Pet the Dog: See Jerk With A Heart Of Gold. There was also the end of Day 2, when he quietly accepted Tony's implied rebuke and let him stay on as the new special agent in charge of CTU.
  • Reasonable Authority Figure: If the heroes could get him to listen for just five minutes he usually made the right call. The difficult part was in getting him to listen, but on Day 3 and The Game he was actually pretty helpful to the team and didn't create much of a fuss unless he had a good reason to.
  • What, Exactly, Is His Job?: His job fluctuated between seasons and he was described as both the District and Division director, while also answering to other District and Division directors. It actually added to hilarious amount of bureaucracy that oversaw CTU yet still couldn't keep it in check.

    Lynn McGill 

Lynn McGill

https://static.tvtropes.org/pmwiki/pub/images/McGil_Lynn_7288.jpg
"This is war. There are going to be casualties."
Played By: Sean Astin

A Regional District Director with the Counter Terrorist Unit, sent to oversee operations at CTU Los Angeles during the Sentox nerve gas crisis on Day 5. High-strung and controlling, McGill had a reputation for firing most of his subordinates soon after taking command of a new office. As pressure mounted from the White House to stop the terrorists, he became increasingly erratic and paranoid of his employees' activities, eventually leading Audrey Raines and Curtis Manning to invoke Section 1.12 of the CTU charter and remove him from his post. Bill Buchanan, arrested earlier for defying Lynn's orders, was reinstated as director.

During the afternoon, Lynn's key card was stolen by his sister Jenny and her boyfriend. Embarassed, Mc Gill failed to report the theft of the card, which was later used by terrorist operative Ostroff to gain entrance to the building and release one of the Sentox canisters, killing 40% of the staff. In a last-ditch effort to flush the gas from the building, McGill left his secure room to unlock a nearby control panel, succumbing to the effects of the gas soon afterward. His action allowed Chloe O'Brian to restart the ventilation system and clear the air, ensuring no further loss of life among the survivors.

  • Bitch in Sheep's Clothing: When he first appears, he presents himself as a Reasonable Authority Figure who also plays a key role in CTU successfully handling the hostage situation at the airport. Then he quickly melts down and reveals his true colors as a complete asshole until shortly before his death.
  • Stupid Boss: Double subverted. When he first appears, he's the only one to successfully figure out and follow Jack's message, allowing the field team to stop Anton Beresch and his men before they claim any more innocent lives. Then he starts making poor decisions that continue to get worse by the minute, that culminates with another terrorist infiltrating and pulling a successful attack on CTU.
  • Take a Moment to Catch Your Death: He and Harry seem to have escaped succumbing to the Syntox nerve gas after Lynn ventilates the CTU building, only for Harry to start coughing up blood seconds later, with Lynn doing so immediately after.
  • Tyrant Takes the Helm: His promotion to head of CTU results in disaster; he's not evil, but his incompetence and insecurity cause him to become increasingly paranoid and impulsive.
  • Unwitting Instigator of Doom: Stepping out to deal with his sister enables the terrorists to get his key card.
  • What the Hell, Hero?: Gets a fairly powerful one from Harry Swinton, the guard watching over him.
    Harry Swinton: So we're all going to die... because you were embarrassed?

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Regional District Manager (Los Angeles)

    Richard Walsh 

Richard Walsh

Played By: Michael O'Neill

"We've gotta find the shooter, Jack. Whatever it takes."

The Regional District Manager of CTU prior to and during Day 1. He informed CTU Los Angeles of the threat against Senator David Palmer of Day 1, but was killed for his knowledge about it.

  • Mentor Occupational Hazard: Walsh is killed in his initial appearance.
  • Reasonable Authority Figure: In his (admittedly brief) screentime, he's never portrayed as anything but helpful to Jack, regularly risking his life to help out.
  • We Hardly Knew Ye: Appears for one scene in the first episode, then has a more extensive role in the second one, before being killed off at the end of that episode.

Regional Division Director (Los Angeles)

    George Mason 
See CTU Director/Special Agent in Charge (Los Angeles).

    Ryan Chappelle 
See Regional District Director (Los Angeles).

    Brad Hammond 

Bradley 'Brad' Hammond

Played By: Randle Mell

A CTU Division Supervisor during Day 2 and Day 3.

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    Bill Buchanan 
See CTU Director/Special Agent in Charge (Los Angeles).

CTU Director/CTU Special Agent in Charge (Los Angeles)

    Christopher Henderson 

    Jack Bauer 

    Alberta Green 

Alberta Green

Played By: Tamara Tunie

The Assistant Regional Division Director during the events of Day 1. When Jack Bauer was relieved from his command at CTU Los Angeles, Green was stationed as the Interim Director. At the request of Senator David Palmer, Bauer was reinstated and Green was transferred to District to be replaced by George Mason.

Alberta was eventually transferred to CTU Washington.

  • Obstructive Bureaucrat: Not just for the sake of being obstructive, mind — she made little secret of the fact that she wanted the director's job permanently, and wanted to purge any staffers who still might be loyal to Jack.
  • Properly Paranoid: Two of the three people (Nina, Jamey, and Tony) she suspected of treason actually did turn out to be traitors, though obviously Jack wasn't their mastermind.
  • Put on a Bus: Disappears about halfway through the first season, which is explained only by a brief line from George implying that David Palmer engineered her removal after it became apparent that she was more concerned with her own career than finding the guys who wanted to kill Palmer.
  • Tyrant Takes the Helm: One of her first actions is to declare Nina and Tony to be covertly helping Jack based on the slimmest of evidence (though in fairness, she was right), then promise that not only will they both be fired, they'll be charged with treason unless they spill everything they know about Jack's "plan."

    George Mason 

George Mason

https://static.tvtropes.org/pmwiki/pub/images/Mason_George_2154.jpg
"As usual, I don't know whether to congratulate you or demand your resignation."
Played By: Xander Berkeley

"I'm supposed to be in DC by now, not chasing little old ladies who set off metal detectors with their knitting needles."

The District Director at CTU in Los Angeles and later its Special Agent in Charge. During Day 2, while searching for a nuclear bomb set to detonate during the day, he was exposed to lethal amounts of plutonium at Mamud Faheen's warehouse in Panorama City, and was given "as much as a week, or as little as a day" to live. When the bomb was recovered, Mason flew it in a plane into the Mojave Desert to detonate safely and died in the plane crash moments before the blast.

  • Convenient Terminal Illness: As he is dying, he volunteers to take Jack's place in delivering the nuclear device to its destination, saying it would be less painful than dying of the symptoms.
  • Dare to Be Badass: He gives this small speech to Jack, telling him that if he is a true hero, he should live and make things right with his daughter.
    "You still have a life, Jack. You wanna be a real hero? Here's what you do. You get back down there and you put the pieces together. You find a way to forgive yourself for what happened to your wife. You make things right with your daughter, and you go on serving your country. That'd take some real guts."
  • Deadpan Snarker: Probably the most prominent and legendary until Chloe came along.
    George: Nice work, Jack. Have you ever noticed there's a body count everywhere you go?

    Jack: Today is the second anniversary of Victor Drazen's death.
    George: Happy anniversary!

    Paramedic: I need all of your clothes off, sir!
    George: You're not even going to buy me dinner?
  • Death Equals Redemption: The revelation that he's dying from radiation poisoning is what leads to him becoming a better man.
  • Dirty Agent: He stole $200,000 from a drug dealer he took down.
  • Dirty Coward: He abandoned his post and tried to escape LA before the nuke went off. Ironically, this is what got him killed, as he was the closest agent available when CTU found a new lead for where the bomb was assembled, which is where he contracted his fatal dose of radiation.
  • Due to the Dead: Or dying anways, as his leaving CTU for the final time was honored with a silent clock.
  • Heel Realization: As he's dying, he realizes that he's alienated everyone close to him, including his son.
  • Heroic Sacrifice/Dying Moment of Awesome He saves Jack from dying in a nuclear explosion by taking over the plane and flying it to a safe location, because he was already going to die anyway of radiation poisoning.
  • It Has Been an Honor: The last words between Mason and Jack amount to this.
  • Jerk with a Heart of Gold: George is sarcastic, irritable and condescending, but when push comes to shove, he tends to do the right thing.
  • Obstructive Bureaucrat: At first, albeit to a lesser extent than Alberta. Then becomes;
  • Only in It for the Money: The reason he took a job with CTU in the first place, a decision he has come to deeply regret.
    George: You happy in this job, hmm? Believe it or not, I used to want to be a teacher. A long time ago. You know why I didn't? DOD offered me more money. That's how I made my decision. So I made myself miserable. And I made everybody else around me miserable. For an extra five thousand dollars a year. That was my price.
  • "Well Done, Son!" Guy: He has a very troubled relationship with his son.

    Tony Almeida 

Anthony 'Tony' Almeida

https://static.tvtropes.org/pmwiki/pub/images/Almeida_Anthony_6692.jpg
"Some people are more comfortable in hell."
Played By: Carlos Bernard

"Just because you were willing to sacrifice your wife, for this job, doesn't mean I'm gonna sacrifice mine."

A federal agent who worked for CTU Los Angeles from its inception. During that time, he was promoted to Special Agent in Charge. After aiding the bio-terrorist Stephen Saunders during Day 3 to keep him from killing his wife, Michelle Dessler, Tony was arrested and sent to prison on charges of treason. After his release, Almeida worked for CTU on a provisional basis before moving away with Michelle. On Day 5 he was grievously injured in the CTU medical clinic by Christopher Henderson and believed to be dead.

Tony survived, however, and joined David Emerson's mercenary group for three years. He was also a key operative in the conspiracy by Alan Wilson and the Prion variant cabal in their plan to use terror to gain a more active role in the United States' military affairs. However, he was actually helping this organization for the sole purpose of meeting Wilson face-to-face and killing him in revenge for the death of Michelle and their unborn son.

  • Aborted Arc: Subverted! It initially didn't look like the Sequel Hook in the "Live Another Day" Blu-Ray that featured Tony would be followed up on due to Twenty Four Legacy being a complete reboot with a brand new cast of characters... until it was revealed that Tony would be appearing in it.
  • Always Save the Girl: In Season 3, he allows Saunders to escape when his men are holding Michelle hostage, putting less effort to Take a Third Option than Jack Did, and gets sent to prison for it.
  • Anti-Hero: Type V in Season 7, when he admits that he has done "a lot of bad things" in the past, and is willing to let a security guard who is collaborating with them die for the sake of expediency. This is subverted when he kills Larry Moss.
    • Anti-Villain: Although he did very nasty things over the course of the seventh season, they were to stop someone who was much worse. Of course, that still doesn't make what he did right.
  • Author Appeal: Tony's Cubs mug is a product of actor Carlos Bernard being a huge fan of the team.
  • Back from the Dead: Was clinically dead after Henderson injected him with an overdose of hyoscine-pentothal. However, since the injection missed his heart which would have killed him right on the spot, he was resuscitated by some of Henderson's men soon after.
  • Big Bad Friend: A zig-zagged version to Jack, as it turns out that Tony is in league with Alan Wilson's cabal, but this itself turns out to be a personal cover all for him to get his revenge. However, though they're after the same man the fact that his interests differ greatly from Jack's keep them as enemies even after the revelation.
  • Big Damn Heroes: His unexpectedly showing up to save Teri Bauer on Day 1 stands out as the moment he earned a LOT of popularity. His first appearance in the fourth season where he saves Jack and Audrey is also considered one of the high points of the show.
  • The Bus Came Back: In Legacy.
  • Catch-Phrase: "Alright?"
  • Chronic Backstabbing Disorder: Has, at various points, performed the double-cross, the triple-cross, and the quadruple-cross.
  • Crusading Widower: In season 5, eventually bringing him to Anti-Villain status in season 7.
  • Death Seeker: It's heavily implied he may have become this late in Day 7.
  • Despair Event Horizon: The deaths of his wife and unborn son, which eventually sent him on a downward spiral that ended with him becoming as bad as the terrorists he was chasing after.
  • Disney Death: When Mandy seemingly blows him up near the end of the fourth season.
  • Dynamic Entry: His first appearance in Day 4 is gunning down Jack and Audrey's attackers.
  • Even Evil Has Standards: His reason for pulling a Heel–Face Turn prior to the events of Day 7 was because the people he was working for would be killing innocent civilians in their next attack, and although he blames the government for what happened to his wife, he feels harming innocent lives goes one step too far. This then gets subverted in the final stretch when it's revealed that he's playing everyone in order to get close to the man who truly ordered Michelle's murder and will do anything to do so, including putting several innocent lives in jeopardy without a single care for what really happens to them.
  • Evil Costume Switch: His attire and overall appearance in Day 7 is radically different to the look he had in all previous seasons.
  • Evil Counterpart: He is what Jack could have become if he lost both Teri and Kim.
    • As a matter of fact, Jack essentially becomes Tony in Season 8 after Renee Walker is murdered. Though unlike Tony, Jack doesn't cross the line of intentionally trying to kill innocent people (he does, however, willingly put them at risk from collateral damage), and when called out, he manages to come to his senses.
  • Foil: To Jack in almost every way, and most tellingly how they each react to threats against their wives. Jack is outwardly berserk while remaining inwardly very clear-headed and pragmatic, while Tony's reaction on Day 3 shows he's capable of masking a complete inner meltdown under his usual soft-spoken, businesslike demeanor.
  • Fake Defector: In the beginning of season 7. And technically at the end too, just not the heroic kind this time.
  • Fallen Hero: Once one of the most trustworthy members of the Counter Terrorist Unit, his quest for revenge made him no better than the terrorists he was fighting.
  • Foreshadowing: The season 3 pilot shows him turning down a job offer in DC because there's no openings for Michelle. This willingness to put her well-being first would cost Tony dearly in the finale.
    • It also makes for a very dark foreshadowing of his actions in Season 7.
    • His fall in Season 7 is a foreshadowing of Jack's Roaring Rampage of Revenge in Season 8. It really hits home, especially because both of them snapped after losing loved ones.
  • Genre Blind: If he hadn't have chosen to go into a Motive Rant/“The Reason You Suck” Speech right on the spot, he probably would have succeeded in his plan to kill Alan Wilson.
  • Heel Realization: In the 24: Solitary short he claims he's had a delayed one after all the years he's spent in prison have given him time to reflect on his actions. True to the way his character is now, it's left unclear whether this is genuine or yet another act.
  • Jerk with a Heart of Gold: In the first season. In most of the seasons after that, though he can sometimes still be disagreeable, he's dropped most of his real Jerk Ass tendencies (up until Day 7, anyway).
  • Jerkass Has a Point: Although it turns out to be (one of several) covers, Tony's claim that he's fighting the government and Jack helping them just makes him a tool isn't entirely unvalid, especially after what Jack himself goes through in Day 8...
  • Kick the Son of a Bitch: When he shoots Cara Bowden and literally kicks Alan Wilson.
  • Knight Templar: Becomes this by Day 7.
  • Kubrick Stare: All. The. Freaking. Time.
  • The Lancer: For a while, anyway.
  • Love Makes You Evil: The death of Michelle and his unborn child turns him evil.
  • Manipulative Bastard: Manages to play everyone at one point or another in his attempt to get revenge against Wilson.
  • The Mole: Was played up as a possibility in Season 1 until Nina Myers was revealed as the real mole. Played straight in Season 7.
  • My Name Is Inigo Montoya: How Tony confronted Christopher Henderson about Michelle Dessler's death.
  • Not So Different: Although not to the extremes of someone like Hodges or Graem, he throws a little bit of this to Jack. It becomes all the more Harsher in Hindsight at the end of the series.
  • Redemption Rejection: One of the biggest differences between Jack and Tony's respective revenge arcs. When Jack attempted to talk him down from going through with his revenge plan, Tony simply gagged Jack and then armed a bomb on him.
  • Revenge Before Reason: So much that he's completely willing to kill innocent people if it can help him get one step closer to avenging his family.
  • Stuffed into the Fridge: A rare non-romantic example: he was killed off halfway through season 5 solely to serve as the final bit of motivation Jack needed to kill Henderson. Diminished somewhat after he was brought back in season 7.
  • Villain Protagonist: In Day 7, so much that in the second half of it he winds up getting more focus than Jack by the end.
  • We Used to Be Friends: It's pretty clear that by the end of Day 7, whatever friendship Tony and Jack once had is all but dead.
  • Wham Line: "I'm sorry, Larry."
  • Woobie, Destroyer of Worlds: In Season 7, he's bent on killing everyone involved in the Season 5 conspiracy, and accepts the deaths of everyone else as an acceptable loss.
  • You Are in Command Now: Gets this on Day 2 and on Day 4, the latter being an example that's borderline hilarious; Tony goes from angry unemployed drunk to head of CTU in about four hours, but somehow, manages to fall under the Rule of Cool.

    Erin Driscoll 

Erin Driscoll

Played By: Alberta Watson

The Special Agent in Charge of CTU Los Angeles for the first half of Day 4.

  • Bad Boss: She isn't evil, but she is a really bad boss.
  • I Did What I Had to Do: Her justification for signing off on Sarah Gavin's torture.
  • Ice Queen: Driscoll only shows her softer side around her daughter. Otherwise, she's so cold that it wouldn't be a surprise if her underlings started having to put on coats around her.
  • Jerk with a Heart of Gold: She truly does love her daughter.
  • Morality Pet: Done in a very confusing way. She does love her daughter, and is devastated when she dies, but at the same time, she keeps ignoring her, despite the fact that Maya Driscoll appears to need frequent supervision.

    Michelle Dessler 

Michelle Dessler

https://static.tvtropes.org/pmwiki/pub/images/Dessler_Michelle_7682.jpg
"Secretary Heller doesn't run CTU, I do and I'm ordering you to go back to work."
Played By: Reiko Aylesworth

A high ranking federal agent who worked for CTU and Division. She helped save American lives during the national crises of Days 2, 3, and 4. She was married to Tony Almeida and later divorced him; however, they reconciled during the events of Day 4.

  • Fanservice Pack: She's always attractive, but gets a noticeably more cleavage-tastic outfit at the start of Day 3.
  • Feminine Women Can Cook: Falls under Type 2, the "Independent Successful Career Woman" who's inept in the kitchen. Notably, it's mainly a source of ribbing from Tony and not really used to ding her femininity at all.
  • The Lost Lenore: To Tony.
  • Plot Armor: The only character in season 3 who proves to be fully immune to the Cordilla Virus. Unfortunately for her, this Plot Armor doesn't extend to being blown up.
  • They Do: With Tony.
  • Working with the Ex: Divorced Tony after he let his life fall apart after being released from prison, leading to some tension between them on Day 4, but got back with him at some point between Seasons 4 and 5.

    Bill Buchanan 

Bill Buchanan

https://static.tvtropes.org/pmwiki/pub/images/Buchanan_William_8918.jpg
"I know Jack. I don't always agree with his methods, but I trust his judgment."
Played By: James Morrison

The former Special Agent in Charge of CTU Los Angeles. Before taking command of the LA CTU, he was a Regional Division Director at CTU. He was initially sent to CTU Los Angeles by Division Command to oversee the exchange of Jack Bauer for Behrooz Araz in Day 4. When Michelle Dessler resigned as Director of CTU at the end of Day 4, Buchanan took permanent command of CTU. He was forced to step down in Day 6. During Day 7, he was working covertly with Chloe O'Brian and Tony Almeida to uncover a conspiracy within the United States government to aid African dictator General Benjamin Juma. During Juma's attack on the White House, Bill sacrificed himself by creating an explosion that destroyed most of the attack force and allowed the FBI to retake the White House and save President Allison Taylor.

    Nadia Yassir 

Nadia Yassir

https://static.tvtropes.org/pmwiki/pub/images/yassir_nadia_4230.jpg
"Fayed, where is your honor?"
Played By: Marisol Nichols

The Chief of Staff at CTU Los Angeles during the events of Day 6. She was implicated as a mole and accused of leaking CTU's satellite data to terrorists. However, she was later proven innocent and went back to work. When Bill Buchanan was forced to step down, he was successful in pushing for Nadia to replace him as the Interim Director of CTU. She led CTU for the rest of the day, until Division could send over a replacement.

  • Ship Tease: With both Milo Pressman and Mike Doyle.
  • Token Enemy Minority: Her being a Muslim leads her to be suspected of being a traitor at one point.
  • You Are in Command Now: Is left in charge of CTU after Buchanan is forced out of his position, supposedly on a temporary basis, though she actually ends up in charge until the day ends. According to Word of God, she was given the job on a permanent basis and stayed in charge of CTU Los Angeles until the entire organization was shut down by Noah Daniels.

Chief of Staff (Los Angeles)

    Nina Myers 

    Tony Almeida 
See CTU Director/Special Agent in Charge (Los Angeles).

    Michelle Dessler 
See CTU Director/Special Agent in Charge (Los Angeles).

    Curtis Manning 

Curtis Manning

https://static.tvtropes.org/pmwiki/pub/images/Manning_Curtis_8701.jpg
Played By: Roger Cross

The Director of Field Operations of CTU Los Angeles. Previously, he was head of Tactical and Assistant Director of Field Operations in CTU Los Angeles. During the events of Day 6, he took Hamri Al-Assad hostage and Jack Bauer was forced to kill Curtis.

  • Big Damn Heroes: Helps Jack to save Tony from Mandy in the penultimate episode of Season 4 and rescues Audrey from Christopher Henderson's men in Season 5.
  • Commuting on a Bus: He disappeared a lot during the second half of Day 5, even getting removed from action right before the finale. This made his death early on in Day 6 a little less surprising.
  • Dynamic Entry: Delivers a glorious knock-out punch to Mandy at the end of Day 4.
  • Et Tu, Brute?: The look of hurt and betrayal Curtis gives Jack as he dies all but scream this. He really never thought that Jack would choose "an animal" over him.
  • Fatal Flaw: Curtis hated Teeth-Clenched Teamwork, first with Marianne Taylor then with Assad.
  • My Name Is Inigo Montoya: Curtis told Assad the name of his army unit (the one he executed of which Curtis was the only survivor) before attempting to kill him.
  • One-Hit KO: Again - Fist, meet Mandy.
  • Remember the New Guy?: One of the most direct examples in the series, as his first appearance has Jack talking to him and revealing they've worked together at CTU in the past, even though he didn't appear at all in the first three seasons and the season 4 prequel shows Jack was almost immediately fired after that. Justified since during the first three seasons, he could have been working on assignment somewhere out of Los Angeles. One of the Expanded Universe novels that takes place before the first season even supports this, having Curtis on assignment in Las Vegas.
  • Revenge Before Reason: Is killed because he refuses to let the terrorist who killed his unit live.

    Nadia Yassir 
See Chief of Staff (Los Angeles).

CTU Director of Field Operations (Los Angeles)

    Christopher Henderson 

    Jack Bauer 

    Ronnie Lobell 

Ronnie Lobell

Played By: Shawn Doyle

The Director of Field Operations during Day 4.

  • Informed Ability: The Director of Field Operations is otherwise held by a badass like Jack, Curtis Manning, Mike Doyle, and previously Christopher Henderson, so you'd think he would be a badass too. He's not.
  • Jerk with a Heart of Gold: Was cold towards Jack but helped him in his final seconds.

    Curtis Manning 
See CTU Director/Special Agent in Charge (Los Angeles).

    Mike Doyle 

Mike Doyle

https://static.tvtropes.org/pmwiki/pub/images/doyle_mike_5048.jpg
"You found your answers. I'm still looking for mine."
Played By: Ricky Schroder

CTU Director of Field Operations during the majority of Day 6.

  • Dark and Troubled Past: Alluded to.
  • Eye Scream: The rigged component the Chinese gives him blows up directly in his eyes.
  • Hidden Depths: See Noble Bigot with a Badge below. Nadia is also caught completely off guard when he quotes the Quran.
  • Jerk with a Heart of Gold: He can be very unpleasant, but he does soften up later on.
  • Noble Bigot with a Badge: Seemingly a bigoted, arrogant, stuck-up, ends-justifies-the-means agent who won't take crap from anyone and isn't afraid to make things physical if they disagree. Has also secretly covered up honest mistakes and screw-ups of his co-workers to make sure they don't get hot under the collar with their Obstructive Bureaucrat superiors, and admits he's spiritually lost. He also later defies orders when he realizes it's the right thing to do, and encourages his superior to do the same.
  • Out-Gambitted: He plans on betraying the Chinese agents he was making a deal with in order to protect Josh. Unfortunately he doesn't suspect that the agents were also planning on betraying him too, which leads to him getting blinded.
  • Ship Tease: With Nadia, despite their very rocky start.
  • Suspiciously Similar Substitute: For Curtis Manning, as he's literally brought in just a few hours after Curtis' death to fill in for him.

CTU Agents (Los Angeles)

    Chase Edmunds 

Chase Edmunds

https://static.tvtropes.org/pmwiki/pub/images/Edmunds_Chase_2503.jpg
Played By: James Badge Dale

A federal agent who worked undercover for CTU Washington D.C., and was later a field agent and Jack Bauer's partner at CTU Los Angeles. He also dated and later lived with Jack's daughter Kim, but the two of them separated after Jack's apparent death.

  • Back for the Dead: He finally returns in the EU novel Deadline only to be unceremoniously killed.
  • Dropped a Bridge on Him: Expanded universe novel 24: Deadline reveals that he returned after the events of Day 8 to help Jack, only to be shot and killed by a member of a biker gang.
  • Heroic Sacrifice: He doesn't die, but Jack is forced to cut his hand off with a fire axe to prevent the Cordilla Virus from being released, although Jack mentions that the doctors at the hospital Chase was taken to afterwards believed they could re-attach it somehow.
  • The Lancer: To Jack in Season Three.
  • Life-or-Limb Decision: Ends up getting his hand removed in order to keep the Cordilla Virus from being released.
  • Long Bus Trip: Although the end of Day 3 left him in a position where he could easily return to the show, he never actually did. His only appearance since the third season was the expanded universe novel 24: Deadline.
    • Bus Crash: Possibly, as he was last mentioned living in Valencia, which was nuked in Season 6. 24: Deadline disproves this; he used the aforementioned nuking as a way to fake his death.
  • Remember the New Guy?: To those who only watch the TV show, he was this in Season 3, as he debuted in the ''24: The Video Game]], released (and set) between seasons 2 and 3.
  • Rule of Three: Suffers three increasingly worse hand injuries throughout the third season, with the final one resulting in it getting cut off.
  • Secret Relationship: With Kim Bauer.

    Gael Ortega 

Gael Ortega

https://static.tvtropes.org/pmwiki/pub/images/ortega_gael_3708.jpg
Played By: Jesse Borrego

A CTU agent who was working with Tony Almeida and Jack Bauer on an undercover sting to infiltrate the Salazar crime ring in Mexico to follow a lead on the Cordilla virus. He was killed at the Chandler Plaza Hotel due to exposure from the virus.

  • Cruel and Unusual Death: The Cordilla virus is said to cause an agonizing death.
  • Fake Defector: He seemed to be on the Salazars' side, only to turn out he was working with Jack the whole time.
  • Honor Before Reason: Despite the painful and gruesome death the virus guarantees, he refuses to commit suicide to end it, as suicide is a sin.
  • I Should Have Been Better: Before he dies he laments being unable to stop the Cordilla virus from being unleashed leading to the deaths of nearly every single person in the Chandler Plaza Hotel.
  • Reverse Mole: The entire first quarter of the third season plays him up as a villain, before revealing that he's genuinely one of the good guys.
  • Wham Shot: He initially seems like nothing more than an enemy agent, until he steps out of his office into CTU headquarters.

     Lee Castle 

Lee Castle

https://static.tvtropes.org/pmwiki/pub/images/castle_lee_2488.jpg
Played By: Cameron Bancroft

A CTU Los Angeles field agent active during Day 4. He played key roles in most of the anti-terrorist action undertaken during that day.

  • Sacrificial Lion: Proves to be extremely competent throughout the season (even saving Jack's life at one point), but is quickly subdued and killed by Mandy to drive in how cold Mandy is. To an extent, it also drives in how much danger Tony is in.
  • Teeth-Clenched Teamwork: Lee was not enthusiastic about working with Tony.

    Tom Baker 

Tom Baker

Played By: Daniel Dae Kim

A CTU field agent who often accompanied Jack Bauer and later Chase Edmunds on field assignments. He assisted Bauer in the rescue of Kate Warner and was notable for his assistance in capturing the terrorists Syed Ali and Stephen Saunders.

  • Chuck Cunningham Syndrome: He disappears near the end of Day 3, as he's last seen discussing with Jack how their sting operation to capture Saunders went wrong and is never seen again after that.

CTU Analysts (Los Angeles)

    Kim Bauer 

    Chloe O'Brian 
See CTU Director/Special Agent in Charge (New York).

    Edgar Stiles 

Edgar Stiles

https://static.tvtropes.org/pmwiki/pub/images/Stiles_Edgar_4296.jpg
"Look, I'm just a little nervous. But if I say I can do it, I can do it."
Played By: Louis Lombardi

An intelligence analyst with CTU Los Angeles. He frequently expressed reluctance to defy authority, but was convinced on several occasions to do so by friend and fellow analyst Chloe O'Brian. Edgar was killed during a nerve gas attack on CTU during Day 5.

  • All Love Is Unrequited: Implied to be this for Chloe.
  • Butt-Monkey: Things rarely go well for Edgar; he's disrespected, bullied, underappreciated, his mother dies and eventually he's killed due to his own bad luck.
  • Establishing Character Moment: Chloe had to tell Edgar to speak up during a briefing.
  • Fatal Flaw: Edgar is aware he's a Failure Hero and he tried to overcome that. He tried to personally save his mom during a nuclear meltdown, then in season 5 he tried to find Carrie Bendis and he took too long to evacuate CTU.
  • Photographic Memory: Part of what makes him such a good analyst.
    Edgar: And, uh, I don't need my laptop, I have everything memorized.

    Morris O'Brian 

Morris O'Brian

https://static.tvtropes.org/pmwiki/pub/images/brian_morris_4344.jpg
Played By: Carlo Rota

An intelligence agent at CTU Los Angeles and the husband of Chloe O'Brian. The two of them were divorced and Morris left CTU, only to return during the events of Day 5, and he resumed his duties full-time by Day 6. By Day 7, the two had remarried and had a child together, named Prescott.

  • Bus Crash: Died in a car crash between Day 8 and Live Another Day.
  • Cold-Blooded Torture: Fayed puts him through some pretty horrific torture.
  • Crazy Jealous Guy: Morris is irrationally jealous of Milo Pressman, both because he went on a few dates with Chloe and because he comes across as more professional and was heroic under fire, while Morris feels he failed everyone.
  • Demoted to Extra: After having a central role in the second half of Day 5 and all of Day 6, he only appears in two episodes of Day 7.
  • Dropped a Bridge on Him: He dies off-screen between seasons in a car crash.
  • Heroic BSoD: When Fayed tortures him and forces him to arm the rest of his nukes, he doesn't take the fact that he unwillingly helped him endanger the lives of everyone in the country well, which nearly causes him to start lapsing back into his alcoholism.
  • Jerk with a Heart of Gold: Morris comes across as an overconfident jackass, but has many moments where he shows empathy, such as comforting Nadia when Milo dies or talking to Chloe when she feels bad about Edgar's death. He's also overwhelmed with pure guilt and self-loathing after being forced to help Fayed.
  • Off the Wagon: The guilt of helping Fayed leads him to have a whiskey.
  • Slimeball: Morris can be more than a little lecherous.
  • Working with the Ex: At first, with Chloe. They get back together.

    Milo Pressman 

Milo Pressman

https://static.tvtropes.org/pmwiki/pub/images/Pressman_Milo_862.jpg
Played By: Eric Balfour

An independent technological contractor who freelanced for CTU Los Angeles during the events of Day 1. After that, he started working at CTU Denver for some time. However, after the events of Day 5, he was transferred back to Los Angeles. By Day 6, he had been formally installed as the unit's Internet Protocol Manager. He was killed by Zhou Yong during Day 6.

  • Back for the Dead: Variation. He disappears late on Day 1 and doesn't return until Day 6. He is killed on Day 6, but makes it through most of the season.
  • Boom, Headshot!: Zhou kills him this way.
  • Heroic Sacrifice: Milo lies and tells Zhou that he's the man in charge of CTU, getting himself killed in the process and saving Nadia's life.

    Adam Kaufman 

Adam Kaufman

https://static.tvtropes.org/pmwiki/pub/images/kaufman_adam_6603.jpg
Played By: Zachary Quinto

An analyst at CTU Los Angeles during Day 3. He frequently worked with Kim Bauer and Chloe O'Brian, and was considered one of the top analysts at that time.

  • Berserk Button: You better not touch "his stuff" if you know what's good for you.
  • Chuck Cunningham Syndrome: He and Chase were the only major surviving characters from Day 3 to never make another appearance in the show. Unlike Chase, however, he doesn't even get mentioned again.
  • Jerk with a Heart of Gold: Is extremely rude and condescending but has his moments with Chloe and Kim. Plus, he loves his sister and was crushed when he found out she could be infected.

    Sarah Gavin 

Sarah Gavin

https://static.tvtropes.org/pmwiki/pub/images/Gavin_Sarah_5894.JPG
"Ms. Driscoll, I'm not a spy. I'm not. Please believe me."
Played By: Lana Parrilla

An intelligence agent at CTU Los Angeles during Day 4.

  • Cold-Blooded Torture: She's subjected to electric shock torture by CTU when they suspect her of being The Mole.
  • Frameup: She's set up to look like The Mole by Marianne.
  • It's All About Me: Michelle calls her out on the fact that she's more concerned with CTU compensating her for what happened with the Marianne incident than helping to stop Marwan, leading to her being dismissed.
  • Never Live It Down: In-universe inversion. She refuses to let CTU forget how they incorrectly assumed her to be the mole.

    Carrie Turner 

Carrie Turner

https://static.tvtropes.org/pmwiki/pub/images/turner_carrie_7716.jpg
Played By: Lourdes Benedicto

An employee at District who was called in to assist CTU Los Angeles during Day 2.

  • Karma Houdini: Despite all of the trouble she caused Michelle just to spite her she doesn't really get any major comeuppance; the worst she goes through is her being shocked to see that Michelle isn't being detained any more.
  • Villainy-Free Villain: It's very easy to forget that technically, she isn't a villain.
  • We Used to Be Friends: Was pretty close to Michelle before she wound up ruining her brother's life.
  • Yes-Man: Whenever Michelle bends or breaks the rules in order to help Jack, she always tries to report her, and all because she wants to suck up to the higher ups at CTU.
  • Your Cheating Heart: She had an affair with a married man, who was also Michelle's brother.

    Jamey Farrell 

Jamey Farrell

Played By: Karina Arroyave

A programmer and analyst at CTU Los Angeles, present during many terrorist crises during the early years of the Counter Terrorist Unit. She later worked as a mole inside CTU for Ira Gaines in his assassination attempt against Senator David Palmer, and was killed by fellow mole Nina Myers in a staged suicide.

    Marianne Taylor 

Marianne Taylor

https://static.tvtropes.org/pmwiki/pub/images/Taylor_Marianne_1497.JPG
Played By: Aisha Tyler

An intelligence agent working for CTU, though also secretly spying on their actions under orders from one of Marwan's co-conspirators. Was in a relationship with Curtis Manning until Curtis saw her true colors, leading him to break things off.

  • Bitch in Sheep's Clothing: Never actually shown as this during her onscreen appearances, as she acts like a grade-A bitch start to finish, but it's implied she was like this while dating Curtis.

    Spenser Wolff 

Spenser Wolff

Played By: Jonah Lotan

A CTU analyst in season 5. He and Chloe slept together the night before.

Tropes

  • Meaningful Name: He's a wolf in sheep's clothing.
  • The Mole: For Walt Cummings.
  • Unwitting Pawn: He thought he was doing an internal investigation into CTU for the Justice Department. He ends up walking an assassin into CTU.

    Shari Rothenberg 

Shari Rothenberg

Played By: Kate Mara

    Paula Schaeffer 

Paula Schaeffer

Played By: Sara Gilbert

A systems analyst and programmer that initially worked with Tony and Michelle during Day 2.

  • Almost Dead Guy: Mason ordered that Paula be kept awake so she can tell them how to decrypt their files before the bombing. They retrieve the files but the stress kills her.
  • Heroic Sacrifice: She stays behind in CTU to finish up vital work, and dies in the ensuing bomb blast.
  • Mauve Shirt: She initially seems to be a major recurring character, even getting her own profile page on the official 24 website, but is killed less than a quarter into the season.
  • Sacrificial Lamb: Paula was the first major CTU character to die in season 2.
  • Shipper on Deck: Paula was the first to notice sparks flying between Michelle and Tony.

    Carrie Bendis 

Carrie Bendis

Played By: Danielle Burgio

A minor analyst in season 5.

Tropes

  • Butt-Monkey: First Lynn McGill fired her for no good reason then Bierko's assassin killed her for discovering a nerve gas canister.
  • Mauve Shirt: Got mentioned by first name a couple times.

CTU Director/CTU Special Agent in Charge (New York)

    Chloe O'Brian 

Chloe O'Brian

https://static.tvtropes.org/pmwiki/pub/images/brian_chloe_4888.jpg
"I was inappropriately blunt. Sorry—I do that a lot."

A senior intelligence analyst with the Los Angeles Counter Terrorist Unit. She also served as Internet Protocol Manager at that unit, and later assumed a major role at the agency's reopened New York office. As one of Jack Bauer's closest friends and confidantes, she played a vital role in averting several terrorist attacks on the city of Los Angeles and the United States of America.

During Day 8, while investigating threats against a planned peace accord between the U.S. and the Islamic Republic of Kamistan, O'Brian was named acting Special Agent in Charge of CTU New York and tasked with capturing Jack Bauer before he could expose the Russian government's part in the attacks. After preventing Jack from assassinating the Russian president, Chloe helped him expose the conspiracy, then was forced to say goodbye before Jack went into hiding.

  • An Hour in the Limelight: Day 8: 4-5 AM, where Jack and Cole spend the hour exchanging fire with terrorists and Chloe works to restore power to CTU.
  • Action Survivor: She's far more apt behind a computer than going into the battlefields, compounded with the fact that she hates using guns. However there's always at least one moment Once a Season since her debut where she comes under life-threatening conditions, and often comes out of it with little to no scratches.
  • Adrenaline Makeover: She's almost unrecognizable in Live Another Day, having dyed her hair black and gotten several tattoos in the four years since season 8.
  • All Love Is Unrequited: Word of God is that she is in love with Jack, but would want "his permission" to tell him.
  • Armor-Piercing Question: A very nice one in the final episode when she's trying to talk Jack down and he tells her to shut up. "Or what? You'll kill me too?!"
  • Breakout Character: One of the more notable and unique examples, due to initially being disliked in her first season. Nowadays, she's considered as much a face of the show as Jack is.
  • Broken Bird: By the events of Live Another Day, due to her family's death.
  • Deadpan Snarker: She's the main source of snark in the show.
  • Deuteragonist: In later seasons.
  • Doesn't Like Guns: In Season 8 she states that she absolutely hates firearms.
    • Batman Grabs a Gun: That said, she will use one if left with no other option. The most famous example is in Season 4 where she uses the nearest thing she can find (an MI-6!) in self defense, but there are a few other times, such as in the Day 5 premiere and Day 8 finale.
  • Et Tu, Jack?: She gets this reaction after Jack knocks her unconscious during the second-to-last episode.
  • Expy: In Live Another Day, she becomes one for Lisbeth Salander, not only with her role in the story but even her appearance.
  • Hero Antagonist: During Jack's Face–Heel Turn in the final season. It's even played around with what type she is: At first, it seems like she's just going to get in his way and serve in the typical Hero Antagonist role that most characters in this position (like Chappelle) have, but after his true motives are revealed, she becomes the only one who's really trying to see justice carried out by that point.
  • Honor Before Reason: Chloe refuses to help the US government arrest Jack after his brief Face–Heel Turn and subsequent attempt to hide from the US and Russia during Day 8. Due to this, Chloe is arrested in front of Morris and her son, Prescott, and it is implied she will be in jail for fifteen years at least. When Chloe refuses, she knows the consequences of refusing. These events take place in "Chloe's Arrest", an epilogue for Day 8 on the DVD release.
    • To make matters worse, this was the exact scenario scenario that Morris tried to avert in Day 7. When the agents pursuing Jack want information on his whereabouts, Morris is told that if he doesn't cooperate, Chloe will be prosecuted for helping him, and their son will go for years without his mother.
      • However, this may not be canon, as Day 9 she reveals that Morris and Prescott were killed, presumably in a hit meant for her, and she survived not because she was in captivity, but because she'd been forced to work late. Either that, or "Chloe's Arrest" is canon, but she was ultimately let go, possibly because the authorities didn't have enough actual proof to keep her detained. It however also mentioned she did serve prison time after Day 8
  • Innocently Insensitive: One of her more notable traits when she first appeared; a lot of the time she wound up saying something at the wrong time that was unintentionally dickish. This was eventually phased out.
  • Jerk with a Heart of Gold: Always sarcastic and faux-erudite, but is very loyal to her friends and family.
  • Out of Focus: In season 7, with the main contributor being Mary Lynn Rajskub's real life pregnancy.
  • Outliving One's Offspring: In between the events of the Day 8 finale and Live Another Day, her son and husband were killed in a car crash.
  • Plucky Comic Relief: The closest you can get on this show, anyway.
  • Properly Paranoid: Kinda. She initially refused to help Jack at the end of the series and doubted his claims about the coverup of Russia's involvement in the Hassan murder because she was increasingly worried that he wasn't thinking straight. Although she was wrong about there being no coverup, oh dear god was she ever right about the not thinking straight part.
  • Sole Survivor: Of her family and Open Cell. Just like Jack, she can't catch a break.
  • Token Good Teammate: Of Open Cell. Although she believed in Adrian's cause of reporting the governments' crimes to the public his attempting to get the drone override device to interfere with everyone major weapon system was a bit to extremist for her, leading her to quickly turn against him.
  • Took a Level in Kindness: Starting midway through Day 3.
  • True Companions: With Jack.
  • Voice with an Internet Connection: She will give instructions to Jack on what the best route is, and how to avoid bad guys whenever possible, via earpiece.
  • What the Hell, Hero?:
    • Gives one to Morris when he gives information on Jack in order to prevent her from going to prison.
    • Famously to Jack in the finale.
  • Working with the Ex: When she was working with Morris, although they eventually get back together.
  • You Are in Command Now: Late in the final season until Pillar comes in.

    Brian Hastings 

Brian Hastings

https://static.tvtropes.org/pmwiki/pub/images/hastings_brian_7081.jpg
Played By: Mykelti Williamson

The Director of CTU New York during Day 8. His main objective as director was to streamline everything and repeatedly stressed his focus on "efficiency". Hastings was removed from his position by Division following CTU's failure to save IRK President Omar Hassan and by inadvertently having hired Dana Walsh, who was revealed to be a mole working for IRK terrorists.

  • Jerk with a Heart of Gold: Was initially a Jerkass but becomes this after refusing to let Renee Walker take the blame for a failed mission.
  • Put on a Bus: Is dismissed as Director after CTU fails to prevent Omar Hassan's death. He accepts the decision, citing his hiring of Dana Walsh as a mistake. He hands the reigns to Chloe, exits with 7 episodes left in the season, and doesn't appear again.
  • Reasonable Authority Figure: Following Character Development.
  • Took a Level in Kindness: He was initially an unsympathetic douche-bag, but he slowly softened as the day continued, and eventually when he was dismissed, he didn't fight it, and he personally took some responsibility for the day's events.

CTU Agents (New York)

    Cole Ortiz 

Cole Ortiz

https://static.tvtropes.org/pmwiki/pub/images/Ortiz_Cole_2084.jpg

The Director of Field Operations at CTU New York during Day 8. His relationship with and engagement to CTU Chief Data Analyst Dana Walsh led to his participation in the cover-up of a double homicide for which Walsh was responsible; despite this, he also led several major field operations during the day in attempts to protect Omar Hassan.

  • Dating Catwoman: Even though Dana turns out to be in league with Mehran, he still turns out to have some feelings for her, which is why he takes it very hard when Jack shoots her in cold blood.
  • Good Counterpart: To Jack by the end of Day 8: both are field agents risking life sentences (or worse) by going up against their own corrupt government to expose their shady actions, but while Cole is genuinely doing it for the right reasons, Jack has a far darker motive which would hold far worse consequences.
  • Horrible Judge of Character: Trusting Dana Walsh even after learning that she kept her criminal past a secret. And again later on when he initially believed that Jack primarily just wanted to expose the Russian Government's involvement in Hassan's assassination.
  • From Bad to Worse: Day 8 really sucks for him. First, he finds out his beloved financé has a criminal past that she hid from him, and he keeps it a secret. Next, he finds out she was also The Mole and gets busted for not coming clean earlier. Then he's forced to help Jack after being tricked into thinking Jack just wants to serve justice and again gets in trouble with his superiors, and in the process Jack executes Dana, much to Cole's horror. And after helping catch Jack, he gets in even further trouble for defending Chloe, who was trying to help Jack. Worst of all, considering that Chloe got arrested and is now facing up to 15 years in prison for helping Jack at the end of the day, Cole will very likely be facing similar charges, considering everything else he got busted for earlier, and the fact that it probably won't be too difficult for the authorities to find out he assisted her in making sure Jack got away.
  • It's Personal: Although it's never flat-out stated, the reason he seems very adamant about killing Jack if they can't otherwise force him to stand down during his revenge spree likely has to do with the fact that Jack murdered Dana. Oddly enough, Cole and Jack never actually directly confront each other even after this.
  • The Lancer: For Jack. Usually, anyway.
  • Love Makes You Stupid: After learning about Dana's "past" he did his best to help her cover it up. Unfortunately she had just a few more skeletons in her closet than he could have imagined.
  • Screw the Rules, I'm Doing What's Right!: Upon discovering the Russian government's involvement in Omar Hassan's death he's quick to aid Jack in exposing their crimes. Jack's true agenda eventually gets them working against each other not long after, but he remains on Chloe's side to continue exposing what the Russians did, even though doing so could cost him his job and even his freedom.
  • Suspiciously Similar Substitute: For Tony Almeida, and for Jack: there was some talk that Prinze Jr. might star in a Spin-Off after 24 came to an end.
  • Was It All a Lie?: The fact that Dana couldn't force herself to seriously harm him outside knocking him out before she made her escape pretty much indicates it wasn't entirely.

CTU Analysts (New York)

    Arlo Glass 

Arlo Glass

https://static.tvtropes.org/pmwiki/pub/images/glass_arlo_1931.jpg
Played By: John Boyd

An intelligence agent and aerial drone expert working for CTU New York during Day 8.

  • All Love Is Unrequited: For Dana Walsh, who's engaged and The Mole.
  • Chivalrous Pervert: Glass might be a total lech, but he does grapple with the idea of telling Cole that Dana is 'cheating' on him.
  • Jerk with a Heart of Gold: He's very lecherous (most of his early appearances see him trying to hit on Dana than actually doing work) but he also remains one of the few trustworthy characters on Chloe's side by the end of the season after Jason Pillar takes command of the CTU.
  • Static Character: Despite appearing in every episode of Season 8 (the only one aside from Jack, Chloe, and Cole to do so), Arlo doesn't get a whole lot of character to work with.

    Dana Walsh 

Dana Walsh

https://static.tvtropes.org/pmwiki/pub/images/Walsh_Dana_3133.jpg
"Tick-tock, Mr Bauer. You're running out of time."
Played By: Katee Sackhoff

A CTU mole working for the Russians who has a shady past. She was engaged to fellow agent Cole Ortiz before showing her true colors.

  • Bitch in Sheep's Clothing: While at first she seems like a weak-willed and easily intimidated CTU flunky, she's actually The Mole and a pretty ruthless one to boot.
  • He Knows Too Much: What she does to Bill Prady, simultaneously revealing herself as a mole to the audience.
  • Misplaced Retribution: The main reason Jack murdered her, simply because she'd been working with the Kamistanian terrorists and by extent Russian terrorists that murdered Renee, even though she was actually innocent of that crime.
  • Mistaken for Cheating: Arlo thinks she's having an affair behind her fiancee's back. She's not, but she's meeting her former boyfriend who's blackmailing her.
  • The Mole: For the Kamistanian terrorists.
  • Pet the Dog: Her feelings for Cole at least seemed somewhat genuine. She avoided killing him when escaping from him and even stroked his cheek late in the season.
  • Properly Paranoid: Believed that Jack wanted to murder all those involved in the assassination that the government was covering up rather than just expose them and bring them to justice, her included. Not that it did her much good, but she was right.
  • Sacrificial Lion: Although she's primarily an antagonist, the reasons Jack kills her wind up crossing his own usual moral boundaries, confirming the fact that he's lost it after a few episodes of him acting iffy. It's also likely the reason why Cole seems almost eager to put Jack down for the rest of the season if he doesn't surrender.
  • Suspiciously Similar Substitute: She's like a Michelle Dessler / Nina Myers hybrid.
  • You Have Outlived Your Usefulness: She was extremely worried that Jack was going to pull this on her once she got the datacard for him. She was right.
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