Jack takes his fight directly to the President, as he attempts to force a confession from him that will prove his involvement in the day's events.

Jack and Henderson wage an assault on the submarine, as Bierko prepares to launch an attack against L.A.

Bierko escapes from the transport taking him to Division and uses his last canister of nerve gas for a surprise strike.

Jack searches for a safe place to land the plane, when Logan gives orders to shoot it down.

After stowing away aboard the flight containing Henderson's contact and the incriminating recording, Jack finds himself having to deal with a pilot who refuses to cooperate.

Jack captures Henderson and attempts to force him to hand over the recording, but Henderson targets Heller to buy himself more time.

Jack shows Heller the incriminating recording in the hopes that he will help them take down Logan, but Heller has plans of his own that will save face for the presidency.

Jack and Wayne locate a recording that definitively proves Logan's involvement in the terrorist conspiracy, but Henderson corners them in the hopes of destroying the incriminating tape.

Jack and Wayne locate a source inside Logan's administration who has information on Palmer's assassination. But things get complicated when they learn that Henderson is using leverage to keep her silent.

Jack pushes Audrey for answers when evidence indicates that she may be involved with the terrorists.

Jack bargains with a German intelligence agent in order to find the woman who can lead him to Bierko.

Jack and McGill must take action when they discover that the nerve gas is breaking through the protective seals that are keeping the CTU survivors alive.

Jack takes Henderson to CTU for questioning. Once there, he faces an unhappy reunion with his daughter, Kim.

Jack interrogates Henderson's wife about her husband's connection to the terrorists.

Logan wrestles with his conscience when he learns that Martha is riding in the motorcade with the Suvarovs.

McGill orders Curtis to take Jack into custody for violating presidential orders, but Jack breaks away from Curtis when Nathanson contacts him through Audrey and offers information on the location of the nerve gas.

Jack poses as Rossler and manages to trace one of the canisters of nerve gas, but he goes against orders from the President when the terrorists target a shopping mall.

Jack tracks down a man who has a connection to the terrorists. Logan is forced to grant him immunity in exchange for information on their whereabouts.

Jack contacts Novick and asks for a secret meeting in hopes of gathering evidence against Cummings.

Jack returns to CTU and has an emotional reunion with Audrey, while Curtis tracks the Russians and the stolen nerve gas.

Jack is captured by the terrorists, who use Derek as leverage to force him to compromise CTU's assault operation.

Jack conceals himself inside the airport hanger and surveys the Russian separatists, feeding information to Curtis and his assault team.

Jack and Chloe infiltrate Wayne Palmer's penthouse where David Palmer was assassinated, in the hopes of finding a clue to his murder. Jack convinces Wayne to cooperate and finds some information in Palmer's memoirs that leads him to the airport where the Russian president is about to land.

18 months have passed since the events of Day 4. With the exception of David Palmer, Tony Almeida, Michelle Dessler and Chloe O'Brian, the world believes that Jack Bauer is dead. Jack is living near L.A. under the name of Frank Flynn, working on an oil rig and living with Diane Huxley and her teenage son, Derek.