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CTU Domestic Units are similar to FBI Field Offices, covering operations within a single city or metropolitan area. Domestic Units report directly to Division Command, but are also subject to review and interference from District Command.
Known Domestic Units
- CTU Los Angeles: The busiest domestic unit seen on the show, CTU Los Angeles has averted several large-scale terrorist attacks.
- CTU Austin: Mentioned by Tony Almeida during Day 3. He was being tested by Ryan Chappelle to prove he was competent after being shot earlier in the day. One part of the computer monitor Chappelle had asked him to repeat back to him was an all clear sign from this branch.
- CTU Boston: Curtis Manning originally worked at CTU Boston.
- CTU Denver: Secured a vial of the Cordilla Virus. (Conjecture) (Day 3 11:00am-12:00pm)
- CTU Fairbanks: Helped Jack Bauer run a sting operation on an eco-terrorism group in the graphic novel Midnight Sun.
- CTU Las Vegas: Found a vial of the Cordilla Virus. (Conjecture) (Day 3 11:00am-12:00pm)
- CTU New Orleans: Jack Bauer contacted CTU New Orleans in order to check into the sudden disappearance of Robert Ellis, who was murdered during a telephone conversation with Jack and David Palmer.
- CTU New York: Found a vial of the Cordilla Virus along with the New York Police Department. The vial was attached to a railing but was diffused. (Day 3 11:00am-12:00pm)
- CTU Phoenix: Secured a vial of the Cordilla Virus. (Conjecture) (Day 3 11:00am-12:00pm) CTU Phoenix also sent a helicopter to back up Jack Bauer in the graphic novel One Shot.
- CTU San Diego: Howard Bern was sent to CTU San Diego to create an alibi after raiding the Chinese Consulate and being identified on surveillance film. (Day 4 2:00am-3:00am)
- CTU San Francisco: Found a vial of the Cordilla Virus. (Day 3 11:00am-12:00pm) CTU San Francisco also had the closest first-tier Jane Saunders lookalike.
- CTU Seattle: Found a vial of the Cordilla Virus. (Conjecture) (Day 3 11:00am-12:00pm)
- CTU Tacoma: George Mason worked here before transferring to Los Angeles.
- CTU Washington: Found 2 vials of the Cordilla virus. (Day 3 11:00am-12:00pm) Alberta Green transferred to CTU Washington after the events of Day 1. (The House Special Subcommittee's Findings at CTU)
Note: Phoenix is only seen on screen and not spoken. For Seattle, Las Vegas, Denver and Phoenix, it is not stated explicitly that a Domestic CTU Unit found the vials of the virus. However, since these are large U.S. cities, it makes sense that each would have a domestic unit.