Minor Government Agents in 24 - 24: Season 4

24: Season 4

• Erin Driscoll (portrayed by Alberta Watson) is the new Director of CTU Los Angeles at the start of Day 4. She first appears in the Prequel to Season 4 when she takes over as CTU Director and fires Jack Bauer from his position as Director of Field Operations, due to his heroin addiction. She offers to help Jack find another job, but he turns her down. She reinstates Jack on a temporary basis during Day 4 after the new head of Field Ops is killed by a terrorist. She has a mentally ill daughter named Maya, who suffers from Schizophrenia. Driscoll brings Maya in to the CTU clinic to be treated after an incident involving her neighbor. While Driscoll is managing the crisis of the nuclear reactors, Maya commits suicide by slitting her wrists. Following Maya's death, Driscoll tries to carry on working, but is distracted, nearly fainting at one point. Secretary Heller persuades her to go home and rest, which she does, after handing command of CTU over to Tony Almeida.

• Howard Bern (portrayed by Robert Cicchini) is a field agent who is part of a covert operation led by Jack Bauer to extract Lee Jong, an associate of the terrorist Habib Marwan. Bern's face is identified on camera, and he is apprehended by the Chinese. Faced with the possibility of spending the rest of his life in a Chinese labor camp, Bern reluctantly implicates Bauer as the leader of the operation.

• Lee Castle (portrayed by Cameron Bancroft) is a field agent during Day 4. He is first seen after former agent Tony Almeida returns to work at CTU on a temporary basis. He is depicted as a competent agent throughout the day and is present when CTU raids a nightclub holding Habib Marwan. Castle is shot and killed by Mandy, a villain from Days 1 and 2.

• Sarah Gavin (portrayed by Lana Parrilla) is an analyst at CTU, working closely with Chloe O'Brian and Edgar Stiles. Colleague Marianne Taylor fabricates evidence suggesting Sarah is a mole. Sarah is accused and tortured. When the truth emerges Sarah demands promotion and that the record of her detention be removed from her file. When Driscoll resigns after her daughter's suicide, Sarah makes the same demand to Michelle Dessler. Michelle decides that Sarah is more concerned with her personal disputes than her job during a national crisis and relieves her of her duties.

• Ronnie Lobell (portrayed by Shawn Doyle) is the Director of Field Operations at the start of Day 4. He is killed after being shot by Kalil Hasan.

• Edgar Stiles (portrayed by Louis Lombardi) was a CTU computer analyst. Stiles was the main person responsible for preventing the nuclear meltdown across the United States from occurring in Season 4, despite knowing that his mother had been killed during one of the meltdowns. Afterwards he is promoted to head of CTU analysis after Chloe is demoted. During Season 5 Stiles is killed in a nerve gas attack on CTU by Bierko. He was given a silent clock at the end of the episode in which he died.

• Marianne Taylor (played by Aisha Tyler) is a CTU consultant who is involved in a terrorist plot. Marianne had been in relationship with Curtis Manning, who ended the relationship after learning that she is using the relationship for her career. She blackmails her co-workers after learning that they are helping Jack to gain information. After a plot to kill Jack and Audrey fails, she plants false evidence to scapegoat other agents. However, Edgar Stiles intercepts information on her computer. In exchange for her life, she agrees to retrieve data from the terrorists, but she is shot dead when the perpetrators attack the office where the data is located.