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20 months after last season's shocking season finale, when Jack Bauer was captured by Chinese government agents and taken battered and bloodied to points unknown, a series of horrific terrorist attacks rocks the nation. Part 1 of 2

20 months after last season's shocking season finale, when Jack Bauer was captured by Chinese government agents and taken battered and bloodied to points unknown, a series of horrific terrorist attacks rocks the nation. Part 2 of 2

In the second half of the Season Six premiere, the fight against terror continues after the frightening first two hours set the tone for what appears to be another horrifically long day for Jack Bauer. Part 1 of 2.

In the second half of the Season Six premiere, the fight against terror continues after the frightening first two hours set the tone for what appears to be another horrifically long day for Jack Bauer. Part 2 of 2.

The fight against terror takes a new turn following the day's shocking events.

As the nightmarish morning ticks toward what appears to be another long afternoon for Jack, the untimely and surprising faces of his family surface.

As the horrific day unravels, Jack Bauer, reunited with his estranged father, deals with unthinkable challenges.

The nation continues to reel from the terrorist attacks and Agent Bauer battles unthinkable circumstances.

The nation continues to reel from the terrorist attacks and Agent Bauer battles unthinkable circumstances.

CTU analyst Chloe O'Brian covers for a fellow agent, and CTU cohort Milo Pressman faces the pressure of a new threatening situation.

As a presidential press conference nears, President Palmer calls a staff meeting and unites two unlikely and influential people.

As the current Administration deals with a shocking setback, former President Charles Logan becomes increasingly involved.

As Jack Bauer continues to pursue an unexpected lead, two unlikely foes come face-to-face in attempt to defuse an escalating international situation.

Following the shocking events at the Russian Consulate, CTU tracks Gredenko and attempts to thwart further terror attacks on U.S. soil. Jack Bauer copes with devastating news while Vice President Noah Daniels considers controversial strategies.

The nuclear threat has unexpected consequences while the investigation into the remaining nukes accelerates.

When Jack relays critical information involving Russian terrorist mastermind Gredenko, CTU must respond immediately.

As the Administration resumes an offensive approach, they prepare for the unthinkable.

After Jack Bauer and Agent Doyle team up in an attempt to prevent the advancement of the terror threat facing the country, Jack is jarred from an unforeseen development.

Developments involving Jack Bauer and Agent Mike Doyle have CTU operatives and analysts scrambling to gain control of an intense situation.

As the clock ticks closer to the final hours of Day Six, Jack Bauer copes with the consequences of taking matters into his own hands while Audrey endures what appears to be a post-traumatic reaction to being held captive.

As the clock ticks closer to the "Day Six" finale, Jack Bauer reels from the recent developments involving Audrey Raines while CTU stresses over the international significance of the threatening state of affairs.

As the climactic conclusion to 'Day Six' nears, the Administration copes with a compromising situation as Jack Bauer stops at nothing to get what he wants and to protect the country from an international incident that could change the world forever.

Jack stops at nothing to get what he wants and to protect the country from an international incident that could change the world forever.

The clock approaches the final hours of a long and terrifying day