Day 1
Richard Walsh
Richard was a founding father of CTU. He was shot by Ira after retrieving a key card from Scott.
Ryan Chappelle
Ryan worked at Division during Day 1. He was next in line for director after Richard.
Day 2
Ryan Chappelle
Brad Hammond
Brad took over after Ryan's disappearance.
Ryan Chappelle
Day 3
Ryan Chappelle
Ryan was in this position when President Palmer asked him to sacrifice himself by order of Stephen, a terrorist who had 11 vials of Cordilla Virus and threatened to release it if President Palmer didn't cooperate. Ryan was hesitant at first, but realized it was for the country and gave himself up. He was shot in the head and died.
Brad Hammond
Brad took over again and also took over CTU Los Angeles temporarily.
Day 4
Bill Buchanan
Bill took over as Director. He oversaw the progress by Michelle and CTU Los Angeles during Day 4.
Day 5
Bill Buchanan
After Michelle resigned, he had no choice but to put himself in charge of CTU Los Angeles, making him in charge of Division and CTU Los Angeles.
Day 6
Bill Buchanan
Bill was still in both positions until Karen had to fire him for political reasons.
Day 7
Vacant
After Bill was fired, Division had no one else in line to become Director. They will probably reveal a new director in Day 7, though according to John Cassar and Evan we will see little if not any of CTU in Day 7.
Richard Walsh
Richard was a founding father of CTU. He was shot by Ira after retrieving a key card from Scott.
Ryan Chappelle
Ryan worked at Division during Day 1. He was next in line for director after Richard.
Day 2
Ryan Chappelle
Brad Hammond
Brad took over after Ryan's disappearance.
Ryan Chappelle
Day 3
Ryan Chappelle
Ryan was in this position when President Palmer asked him to sacrifice himself by order of Stephen, a terrorist who had 11 vials of Cordilla Virus and threatened to release it if President Palmer didn't cooperate. Ryan was hesitant at first, but realized it was for the country and gave himself up. He was shot in the head and died.
Brad Hammond
Brad took over again and also took over CTU Los Angeles temporarily.
Day 4
Bill Buchanan
Bill took over as Director. He oversaw the progress by Michelle and CTU Los Angeles during Day 4.
Day 5
Bill Buchanan
After Michelle resigned, he had no choice but to put himself in charge of CTU Los Angeles, making him in charge of Division and CTU Los Angeles.
Day 6
Bill Buchanan
Bill was still in both positions until Karen had to fire him for political reasons.
Day 7
Vacant
After Bill was fired, Division had no one else in line to become Director. They will probably reveal a new director in Day 7, though according to John Cassar and Evan we will see little if not any of CTU in Day 7.
The Chief of Staff is second in command at CTU. If the Director of CTU is unfit for command, the Chief of Staff assumes the duties.
Day 1
Nina Myers
Nina Myers was Chief of Staff to Jack Bauer, Alberta Green, and George Mason. She was arrested for spying on CTU and treason.
Day 2
Tony Almeida
Tony Almeida takes over as Chief of Staff after Nina Myers is arrested.
Michelle Dessler
Michelle Dessler takes over for Tony after he is promoted to Director.
Day 3
Michelle Dessler
Michelle, now married to her boss, Tony Almeida, is still the Chief of Staff at CTU. After her husband is arrested, she goes to work at Division.
Day 4
Curtis Manning
Curtis Manning is Chief of Staff after Michelle is hired to work at Division. However, when Ronnie Lobell, the Director of Field Ops at CTU is shot, Erin Driscoll places him at Lobell's position.
Day 6
Nadia Yassir
Nadia Yassir was the Chief of Staff under Bill Buchanan until Buchanan is fired, and she temporarily takes his place.
Day 1
Nina Myers
Nina Myers was Chief of Staff to Jack Bauer, Alberta Green, and George Mason. She was arrested for spying on CTU and treason.
Day 2
Tony Almeida
Tony Almeida takes over as Chief of Staff after Nina Myers is arrested.
Michelle Dessler
Michelle Dessler takes over for Tony after he is promoted to Director.
Day 3
Michelle Dessler
Michelle, now married to her boss, Tony Almeida, is still the Chief of Staff at CTU. After her husband is arrested, she goes to work at Division.
Day 4
Curtis Manning
Curtis Manning is Chief of Staff after Michelle is hired to work at Division. However, when Ronnie Lobell, the Director of Field Ops at CTU is shot, Erin Driscoll places him at Lobell's position.
Day 6
Nadia Yassir
Nadia Yassir was the Chief of Staff under Bill Buchanan until Buchanan is fired, and she temporarily takes his place.
The Special Agent in Charge refers to a position on the fictional TV show 24. The Special Agent in Charge of , or the Director of CTU, usually coordinates CTU with other agencies such as the FBI and DHS. The Director of Field Operations and the Chief of Staff report to the Director. This position is usually filled by the best or most capable agent at CTU. If the current Director of CTU is unable to fulfill his or her duties, the Director of Division, to whom the Special Agent in Charge reports, will either promote an agent at CTU to the position, or place someone from Division at the post. If no one is available for the position, the Director of Division may place him/herself at the position. During a crisis, the Director of CTU often reports directly to the President of the United States.
Day 1
Jack Bauer
Bauer was director at the beginning of Day 1. He was at Senator Palmer's speech when an attempt on his life was made. Bauer tried to save Palmer but was arrested.
Alberta Green
Green was placed in charge of CTU by Ryan Chappelle after the office was vacant. She seemed to have dislike for Nina Myers.
Jack Bauer
Bauer resumed his duties as Director under the request of Senator Palmer until George Mason arrived from District.
George Mason
Mason was put in place as Director of CTU by Ryan Chappelle, and remained in charge for the rest of the day.
Day 2
George Mason
George was the Director at the start of season 2. Mason was exposed to lethal radiation, but survived. A doctor told him he would not survive the rest of the day. Knowing that he didn't have long to live, he took the place of Jack Bauer to dispose of a nuclear bomb in the Mojave Desert. He was killed by the blast.
Tony Almeida
Almeida took over for George Mason after his death and was director for the rest of the day.
Ryan Chappelle
Chappelle reclaimed the position of director of CTU while Tony Almeida was under arrest for assault for a little under 1 hour.
Tony Almeida
Almeida reclaimed his post after charges were dropped.
Day 3
Tony Almeida
Almeida was the director of CTU until he was shot in the neck and his wound required surgery. Before he was shot, the Cordilla Virus was threatened to be released.
Michelle Dessler
After Tony Almeida was shot, Dessler became Director of CTU whilst Ryan moved to CTU. In the process, she thought Gael Ortega was a double agent. However, Almeida identified him as a triple agent once he recovered enough to speak.
Ryan Chappelle
Chappelle took over for Tony Almeida during the period during which Almeida was incapacitated.
Tony Almeida
Almeida resumed his duties upon his return to CTU, during which he coordinated with Gael Ortega and Jack Bauer during the covert operation in Mexico. Later on in the day, Tony was blackmailed by the terrorist Stephen Saunders. Tony helped Saunders escape from a CTU operation in exchange for Michelle Dessler's life, who at the time was his wife. Tony was caught and relieved of his command.
Jack Bauer
Bauer took over CTU after Tony Almeida stepped down.
Day 4
Erin Driscoll
Driscoll was assigned to Director of CTU prior to Day 4 began. Erin had a daughter named Maya who had schizophrenia. Maya committed suicide and Driscoll resigned.
Tony Almeida
Almeida took over as Director of CTU for a short while after Erin Driscoll resigned. Division then sent Michelle Dessler to take over.
Michelle Dessler
Dessler replaced Tony Almeida after she was sent to take over from Division.
Bill Buchanan
Buchanan ordered Michelle Dessler to step down after Tony Almeida was supposedly 'blown up' in the car accident with Mandi. He then took over command of CTU for the rest of the day.
Day 5
Bill Buchanan
When Michelle Dessler resigned, Buchanan became the Director of CTU.
Lynn McGill
McGill was sent from Division to oversee the work of Bill Buchanan and CTU. After defying an order to place Jack Bauer into custody, Lynn McGill sent Bill Buchanan to holding. Agent Curtis Manning then invoked Section 112 removing McGill from his post. McGill was killed in the Sentox nerve gas attack on CTU.
Curtis Manning
Manning becomes Director briefly after he invoked Section 112 on Lynn McGill. Shortly after, he reinstated Bill Buchanan as Director of CTU.
Bill Buchanan
Buchanan resumed his tenure as Director of CTU after being reinstated by Curtis Manning.
Karen Hayes
Hayes was assigned to CTU after the Centox nerve gas attack. She took over CTU when DHS absorbed CTU Los Angeles.
Day 6
Bill Buchanan
Buchanan, now married to Karen Hayes, was again Director of CTU. Later on, Karen had to fire him for political reasons.
Nadia Yassir
Yassir was promoted to the job after Bill Buchanan was fired. At first, she didn't think she was fit for the job, but gained confidence after handling her job well.
Day 1
Jack Bauer
Bauer was director at the beginning of Day 1. He was at Senator Palmer's speech when an attempt on his life was made. Bauer tried to save Palmer but was arrested.
Alberta Green
Green was placed in charge of CTU by Ryan Chappelle after the office was vacant. She seemed to have dislike for Nina Myers.
Jack Bauer
Bauer resumed his duties as Director under the request of Senator Palmer until George Mason arrived from District.
George Mason
Mason was put in place as Director of CTU by Ryan Chappelle, and remained in charge for the rest of the day.
Day 2
George Mason
George was the Director at the start of season 2. Mason was exposed to lethal radiation, but survived. A doctor told him he would not survive the rest of the day. Knowing that he didn't have long to live, he took the place of Jack Bauer to dispose of a nuclear bomb in the Mojave Desert. He was killed by the blast.
Tony Almeida
Almeida took over for George Mason after his death and was director for the rest of the day.
Ryan Chappelle
Chappelle reclaimed the position of director of CTU while Tony Almeida was under arrest for assault for a little under 1 hour.
Tony Almeida
Almeida reclaimed his post after charges were dropped.
Day 3
Tony Almeida
Almeida was the director of CTU until he was shot in the neck and his wound required surgery. Before he was shot, the Cordilla Virus was threatened to be released.
Michelle Dessler
After Tony Almeida was shot, Dessler became Director of CTU whilst Ryan moved to CTU. In the process, she thought Gael Ortega was a double agent. However, Almeida identified him as a triple agent once he recovered enough to speak.
Ryan Chappelle
Chappelle took over for Tony Almeida during the period during which Almeida was incapacitated.
Tony Almeida
Almeida resumed his duties upon his return to CTU, during which he coordinated with Gael Ortega and Jack Bauer during the covert operation in Mexico. Later on in the day, Tony was blackmailed by the terrorist Stephen Saunders. Tony helped Saunders escape from a CTU operation in exchange for Michelle Dessler's life, who at the time was his wife. Tony was caught and relieved of his command.
Jack Bauer
Bauer took over CTU after Tony Almeida stepped down.
Day 4
Erin Driscoll
Driscoll was assigned to Director of CTU prior to Day 4 began. Erin had a daughter named Maya who had schizophrenia. Maya committed suicide and Driscoll resigned.
Tony Almeida
Almeida took over as Director of CTU for a short while after Erin Driscoll resigned. Division then sent Michelle Dessler to take over.
Michelle Dessler
Dessler replaced Tony Almeida after she was sent to take over from Division.
Bill Buchanan
Buchanan ordered Michelle Dessler to step down after Tony Almeida was supposedly 'blown up' in the car accident with Mandi. He then took over command of CTU for the rest of the day.
Day 5
Bill Buchanan
When Michelle Dessler resigned, Buchanan became the Director of CTU.
Lynn McGill
McGill was sent from Division to oversee the work of Bill Buchanan and CTU. After defying an order to place Jack Bauer into custody, Lynn McGill sent Bill Buchanan to holding. Agent Curtis Manning then invoked Section 112 removing McGill from his post. McGill was killed in the Sentox nerve gas attack on CTU.
Curtis Manning
Manning becomes Director briefly after he invoked Section 112 on Lynn McGill. Shortly after, he reinstated Bill Buchanan as Director of CTU.
Bill Buchanan
Buchanan resumed his tenure as Director of CTU after being reinstated by Curtis Manning.
Karen Hayes
Hayes was assigned to CTU after the Centox nerve gas attack. She took over CTU when DHS absorbed CTU Los Angeles.
Day 6
Bill Buchanan
Buchanan, now married to Karen Hayes, was again Director of CTU. Later on, Karen had to fire him for political reasons.
Nadia Yassir
Yassir was promoted to the job after Bill Buchanan was fired. At first, she didn't think she was fit for the job, but gained confidence after handling her job well.
Day 1
Jamey Farrell
Jamey Farrell, was one of CTU's engineers during Day 1. She was working with Milo Pressman, and Tony Almeida. She was a mole working with Ira Gaines. She was caught and supposedly committed suicide, until Jack realized Nina Myers was another mole who had killed Jamey.
Milo Pressman
Milo worked with Jamey and Tony. He was brought into CTU from Microsoft Office in Seattle as a temporary replacement for Jamey. He remained there for the rest of the day. It is presumed that he returns to Microsoft after the crisis is resolved, and a permanent replacement found. He reappers in Season 6.
Tony Almeida
Tony Almeida was another computer engineer in Day 1. After Nina Myers was arrested, he was promoted to Chief of Staff at the end of the day.
Day 2
Paula Schaeffer
Paula Schaeffer was brought into CTU prior Day 2. In a bomb incident at CTU's headquarters, she was badly injured and then died.
Carrie Turner
Carrie Turner was brought into CTU after Paula's departure. She seemed to have dislike against her boss, Michelle Dessler, who was Chief of Staff, and did anything possible to egg her on. She was fired by Tony Almeida, the head of CTU.
Season 2.5: 24 The Game
Sean Walker
Sean was brought into CTU after Carrie Turner was fired. He later was taken hostage by terrorists and killed.
Adam Kaufman
Adam came into CTU after Walker was killed, he remained in this position throughout Day 3 as well.
Day 3
Kim Bauer
Kim applied to the job prior Day 3. She felt she needed to be closer to her father, Jack Bauer.
Adam Kaufman
Adam joined CTU prior Day 3. He later found out his sister had been affected by the new virus that had been spreading around the country. He left at the end of the day.
Chloe O'Brian
Chloe joined CTU prior Day 3.
Day 4
Chloe O'Brian
Chloe was again at CTU during Day 4.
Sarah Gavin
Sarah Gavin joined CTU under the direction of Erin Driscoll. She was thought to be a mole, and was tortured, later after Driscoll resigned, she complained to Michelle Dessler, who ignored her complaints.
Marianne Taylor
Marianne was Curtis Manning's ex-girlfriend. He didn't like her being there, and demanded her to cooperate after she was discovered as the mole.
Edgar Stiles
Edgar was a computer engineer in this day. He was thought of as a geek, but secretly, his admirer was Chloe O'Brian.
Day 5
Chloe O'Brian
Chloe was still in her position in this day.
Edgar Stiles
Edgar died in a Sentox gas attack.
Morris O'Brian
Morris came in to replace Edgar during this season. He was Chloe's ex-husband.
Day 6
Chloe O'Brian
Chloe is still a computer engineer.
Morris O'Brian
Morris is forced to arm a nuclear bomb and is criticized by Chloe because of it.
Milo Pressman
Milo returns prior Day 6 and falls in love with Nadia Yassir. He later is shot and killed by Chinese mercenaries who infiltrate CTU.
Jamey Farrell
Jamey Farrell, was one of CTU's engineers during Day 1. She was working with Milo Pressman, and Tony Almeida. She was a mole working with Ira Gaines. She was caught and supposedly committed suicide, until Jack realized Nina Myers was another mole who had killed Jamey.
Milo Pressman
Milo worked with Jamey and Tony. He was brought into CTU from Microsoft Office in Seattle as a temporary replacement for Jamey. He remained there for the rest of the day. It is presumed that he returns to Microsoft after the crisis is resolved, and a permanent replacement found. He reappers in Season 6.
Tony Almeida
Tony Almeida was another computer engineer in Day 1. After Nina Myers was arrested, he was promoted to Chief of Staff at the end of the day.
Day 2
Paula Schaeffer
Paula Schaeffer was brought into CTU prior Day 2. In a bomb incident at CTU's headquarters, she was badly injured and then died.
Carrie Turner
Carrie Turner was brought into CTU after Paula's departure. She seemed to have dislike against her boss, Michelle Dessler, who was Chief of Staff, and did anything possible to egg her on. She was fired by Tony Almeida, the head of CTU.
Season 2.5: 24 The Game
Sean Walker
Sean was brought into CTU after Carrie Turner was fired. He later was taken hostage by terrorists and killed.
Adam Kaufman
Adam came into CTU after Walker was killed, he remained in this position throughout Day 3 as well.
Day 3
Kim Bauer
Kim applied to the job prior Day 3. She felt she needed to be closer to her father, Jack Bauer.
Adam Kaufman
Adam joined CTU prior Day 3. He later found out his sister had been affected by the new virus that had been spreading around the country. He left at the end of the day.
Chloe O'Brian
Chloe joined CTU prior Day 3.
Day 4
Chloe O'Brian
Chloe was again at CTU during Day 4.
Sarah Gavin
Sarah Gavin joined CTU under the direction of Erin Driscoll. She was thought to be a mole, and was tortured, later after Driscoll resigned, she complained to Michelle Dessler, who ignored her complaints.
Marianne Taylor
Marianne was Curtis Manning's ex-girlfriend. He didn't like her being there, and demanded her to cooperate after she was discovered as the mole.
Edgar Stiles
Edgar was a computer engineer in this day. He was thought of as a geek, but secretly, his admirer was Chloe O'Brian.
Day 5
Chloe O'Brian
Chloe was still in her position in this day.
Edgar Stiles
Edgar died in a Sentox gas attack.
Morris O'Brian
Morris came in to replace Edgar during this season. He was Chloe's ex-husband.
Day 6
Chloe O'Brian
Chloe is still a computer engineer.
Morris O'Brian
Morris is forced to arm a nuclear bomb and is criticized by Chloe because of it.
Milo Pressman
Milo returns prior Day 6 and falls in love with Nadia Yassir. He later is shot and killed by Chinese mercenaries who infiltrate CTU.