Marwan decides to trade Jack for Behrooz in hopes of distracting CTU from his real objective. Tony and Michelle weigh the consequences of the trade, while Curtis reluctantly interrogates Behrooz…

Jack learns the identity of a man who may be able to lead him to Marwan. He forces Dina to help him in a mock hostage situation that will get…

Audrey places herself in a compromising position when she and Jack learn of her husband’s possible involvement with the terrorists. Marianne offers Curtis information on the location of the override…

Jack and Tony are able to trace Dina’s location, but Behrooz slips through their fingers. Dina demands a full pardon for her son in exchange for information on the override…

Jack and Audrey hide out with an embittered Tony as Audrey makes a positive ID of the man from the kidnapping. Marianne successfully diverts suspicion from herself, leading Driscoll to…

Jack takes Audrey to ID the man she recognized at the compound, but the terrorists get there soon after and pin them down. Jack must call on an old friend…

Jack initiates a fierce gun battle with the terrorists as he races to rescue Heller and Audrey before the military strike begins. Dina questions her own dedication to their cause…

Jack and Driscoll agree to work together when the police make a critical error in dealing with Kalil. Heller and Audrey take drastic action in the hopes of avoiding the…

Jack acts as a bandit and takes hostages to buy Chloe more time to get satellite surveillance. Meanwhile, Chloe must confide in Edgar for help when Driscoll becomes suspicious. Behrooz…

Jack tracks Kalil with Chloe’s aid, but is forced to watch helplessly as Andrew is tortured for information. Behrooz pleads with his parents when they order him to bring Debbie…

Eighteen months have elapsed since the conclusion of Day 3. A commuter train bound for Los Angeles explodes. A man steals a suitcase from a passenger in the wreckage and…