Jack Bauer is returned to CTU, but can't stay with his family because Alberta Green places him under arrest. Green wants Tony Almeida to make a power play. Nina Myers escorts Kim Bauer and Teri Bauer to a hospital, but comes across evidence they may still be targets. David Palmer discovers a link between himself and Bauer, and decides to take matters into his own hands.
Nina Myers attempts to negotiate her release in exchange for information on the nuclear bomb threat against Los Angeles. Tony Almeida questions Reza Naiyeer about his involvement with Syed Ali, while Kate must tell Reza's parents about what is going on. In Oregon, PresidentPalmer's day is disrupted by the unexpected return of someone from his past.
A body infected with a deadly virus is dumped outside National Health Services. President Palmer returns to Los Angeles for the first time since the attempt on his life. Kim is working at CTU and secretly dating Jack's partner, Chase.
Jack and Audrey find themselves in danger while trying to identify a suspect, and Jack must turn to the only person he can trust. Edgar works to avoid a potential nuclear disaster by hacking into the kernel of the override. Dina and Behrooz run from Navi, and Dina is shot.
Jack learns that Graem died as a result of his interrogation. Morris is brought to Fayed. Jack rescues Morris, but not before he is forced into programming the trigger. Fayed escapes with three suitcase nukes, which he is now capable of detonating. Tom Lennox contemplates resigning, when Reed Pollock brings an offer to the table.
Chloe and Bill rescue Renee while Jack and Tony are ambushed by Emerson. President Taylor witnesses Dubaku's next attack. Gedge continues carrying out his plan when Samantha Roth arrives at her apartment.
With only an hour to go before the signing ceremony, Jack Bauer mounts a one-man assault on Charles Logan's motorcade in his continuing mission to avenge Renee Walker's murder. Meredith Reed takes steps to break the story on the Russian conspiracy. Chloe and Arlo identify Jack's contact in the city, and dispatch Cole Ortiz to track him down.