Jack Bauer is called to his office because there's a threat on the life of a US Senator who's running for President; Jack also discovers that his daughter has skipped out her bedroom window.

An assassin has stolen the ID of a photographer scheduled to meet a presidential candidate; Jack's wife searches for their daughter; Jack gets more evidence of a rogue within his unit.

Jack thinks he's identified the mole inside CTU. Kim and Janet realize they are being kidnapped and try to escape. Palmer orders an employee to get dirt on a reporter who might jeopardize his campaign. Ira Gaines' plans come to a ...

District Director George Mason (Berkely) shuts down CTU forcing Jack to escape in order to follow up on a lead on a conspirator. Nina and Jamie try to cover for him. Palmer discovers how a reporter found out about Keith. Jack fina...

Jack follows the arrested conspirator to the police station in order to get more info on Kim's whereabouts. Palmer meets with a reporter who has some damaging information. Kim realizes just how dangerous Ira Gaines really is.

Jack meets up with Teri at the hospital where they wait to talk to Janet about Kim. Palmer confronts his family about the cover up.

Jack returns to CTU to switch the key card with a fake per Gaines' orders. Palmer tries to convince Keith and Sherry to go public about the murder.

Jack delivers the briefcase to the assassin at Palmer's press conference. Palmer wants to let the press know what happened with Keith and the murder.

Jack is taken into custody by the Secret Service after he stops the assassination. He quickly escapes in order to check on another name from the key card. Palmer tries to deal with the assassination attempt.

Jack is on the run after escaping custody and rushes to intercept Ted Cofell before he leaves the city. Nina receives a phone call from Teri and tries to trace the call. Palmer still wants to go ahead with the press conference des...

Jack takes Ted Cofell hostage after finding his name on the key-card and tries to get whatever info he has about the conspiracy which only amounts to the name of another conspirator, a one Kevin Carroll. Palmer starts to piece tog...

Jack closes in on his family's location; a suspicious Green confronts Nina and Tony, and separates them for interrogation; Palmer learns just how far his backers are willing to go.

Jack has a final confrontation with Gaines as a CTU chopper heads to the compound. Nina and Tony talk to Jamey's mother in order to learn why she was helping the assassins. Carl Webb threatens Palmer to keep quiet about the murder...

Director Green and Regional Director Ryan Chappelle question Jack about the day's events. Nina takes Kim and Teri to a safe house after getting them medical attention. Palmer wants a meeting with Jack.

Palmer and Jack finally meet for the first time and discuss Operation Nightfall. Nina talks to Teri about her and Jack's past relationship after they reach the safehouse.

After handing out photos of all the assassins, Jack and Mason discover that one of Palmer's campaign staff is in a romantic relationship with Alexis Drazen. Teri and Kim are attacked in the safehouse. Keith confronts Carl Webb abo...

Jack and Mason use Palmer's campaign staffer Elizabeth Nash in a sting against Alexis Drazen which backfires badly on them. Kim makes a run for Rick's house after getting separated from Teri following the attack.

Jack poses as Alexis Drazen and goes to meet a contact who has vital information. However, a CTU agent with a grudge against Jack might risk the success of the mission. Dr. Parslow takes Teri back to the Bauer house.

Jack and Mason search for location of the address found in Victor Drazen's confidential file. Palmer finally lets the press know about Keith's past. One of Drazen's goons closes in on Teri; Kim is arrested after the police raid Ri...

Jack discovers a top secret detention center houses someone from his past. Tony takes Teri back to CTU as Kim finds herself in jail. Andre Drazen and his soldiers raid the detention center.

Jack is captured by Victor Drazen and Andre when they escape the detention center. Palmer learns he is dominating the California polls. Drazen's men capture Kim after she is released from jail.

In order to buy himself more time Jack puts Victor and Andre in contact via Mason with a hospitalized Alexis Drazen. Palmer becomes involved with a campaign staffer. Tony and Nina learn that Kim has been recaptured.

Jack delivers a cell phone that is unknowingly rigged to explode to Palmer. Kim manages to escape. The identity of the real mole inside CTU is exposed.

After being falsely informed his daughter has been killed, the enraged Jack Bauer goes to the dock to kill the Drazens whilst the traitor at CTU tries to make a quick escape.