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Champagne headaches will have only just worn off and the college football bowl games will still be going, but Fox has scheduled the premiere of the fourth season of “24” for Jan. 3.

The fourth longest day of Jack Bauer’s (Kiefer Sutherland) life will start with a two-hour episode, as the Emmy-winning series begins a 24-episode run that won’t be interrupted by repeats or pre-emptions (unless Fox unearths a couple of “American Idol” specials that are just too pressing to keep on the shelf). After the two-hour episode, the show will move into its regular 8 p.m. Monday slot.

Season 4, Fox reveals, will begin at 7 a.m. and will, once again, take place over the course of a single day. If you want the twists and turns of the season to be entirely fresh, you may want to turn away. The Counter Terrorism Unit is now run by Erin Driscoll (Alberta Watson), an agent who fired Jack when she took over the job. Jack is now working for the secretary of defense (William Devane) and dating his married daughter (Kim Raver), but after the explosion of a commuter train, Jack finds himself back at CTU.

The fate of the world, it seems, hangs in the balance.

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Edited by Cara DiPasquale ([email protected]) and Victoria Rodriguez ([email protected])