The Chinese want Jack to give them Russian nuclear technology, and the President wants the Vice President’s resignation.

Jack’s search takes him to the Russian Consulate, while the Vice President contemplates a sweeping executive order.

CTU’s satellite tracking system is compromised as a bomb-carrying drone heads toward an unknown city. Meanwhile, US forces prepare for a nuclear retaliation on the Middle East.

While Jack looks for Gredenko and tries to save Josh, White House intrigue deepens.

Jack’s search takes him to the home of an old enemy, while a bomber slips into the White House.

Family troubles: Jack with his brother and father while Morris worries about his own brother.

The President meets with a known terrorist, while Jack searches for Morris, Fayed seeks a trigger, and Tom Lennox makes a choice.

Jack looks for a Russian national as his father plots with shadowy patriots. Meanwhile, the President and the Constitution may be in danger.

Jack and former terrorist leader turned peacemaker, Hamri Al-Assad, track a suspicious man to a self-storage facility.

While Jack has problems with Curtis, CTU discovers a nuclear threat and raids a terrorist warehouse, and a shocking explosion shakes LA.

Four more “suitcase nukes” are out there, and Jack’s only lead takes him to the home of his brother.

Jack finds himself confronting his father while the lead terrorist needs help if he’s to explode the remaining bombs.

Horatio and Speedle investigate the slaying of a hooker who is found dead under a bed in a plush beachside cottage, her naked body having been stabbed 23 times. But…

A new U.S. President has negotiated Jack’s release from a Chinese prison so Jack can stop a series of terror attacks… with his life.

Can Jack and an unlikely ally stop a suicide bomber and track the architect of these acts of terror?

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…

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. Logan tries to…

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…

Jack bargains with a German intelligence agent in order to find the woman who can lead him to Bierko. Buchanan chafes against the new chain of command as Homeland Security…

Jack pushes Audrey for answers when evidence indicates that she may be involved with the terrorists. Wayne and Aaron flee from a group of gunmen who have orders from Henderson…

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…

The Russian and US Presidents are set to sign an anti-terror treaty when assassinations rock Los Angeles, a call from a distressed Chloe forces Jack into action and President Logan’s…

There has been a bus crash and the patients are in the ER. Meredith and Derek’s relationship gets more complicated when he dates a fellow doctor. Meredith’s dad goes to…