PA: Due to some graphic violence, viewer discretion is advised.

18 MONTHS OUT OF CTU, JACK SUDDENLY GOES BACK WHEN A COMMUTER TRAIN EXPLODES IN PART 1 OF THE SPECIAL TWO-DAY, FOUR-HOUR "24" SEASON PREMIERE EVENT SUNDAY, JANUARY 9, ON FOX

Part 2 of the Four-Hour Premiere Event Airs Tomorrow, Monday, Jan. 10

Eighteen months after the conclusion of Season 3, CTU has a new leader, Erin Driscoll, a steely government agent who made firing Jack one of her first priorities. After the explosion of a commuter train, Jack, who is now working for Secretary of Defense James Heller and also is romantically involved with Heller's married daughter, Audrey Raines, suddenly finds himself heading back to CTU for a meeting with Driscoll in Part 1 of the special four-hour season premiere of 24, "Day 4: 7:00 AM-8:00 AM" and "Day 4: 8:00 AM-9:00 AM" Sunday, Jan. 9 (8:00-10:00 PM ET/PT) on FOX. (TWF-401/402) (TV-14 V/TV-14 V)

Cast: Kiefer Sutherland as Jack Bauer, William Devane as James Heller, Kim Raver as Audrey Raines, Alberta Watson as Erin Driscoll, Lana Parrilla as Sarah Gavin.

Guest Cast: Mary Lynn Rajskub as Chloe O'Brien, Nestor Serrano as Navi Araz, Shohreh Aghdashloo as Dina Araz, Jonathan Ahdout as Behrooz Araz, Lukas Haas as Andrew Paige, Roger Cross as Curtis Manning, Louis Lombardi as Edgar Stiles, Shawn Doyle as Ronnie Lobell, Logan Marshall-Green as Richard Heller, Joseph Hodge as Dar, Annie Larussa as Jeannie Page, Tony Plana as Omar, Geoff Pierson as John Keeler, Anil Kumar as Kalil Hasan, Kevin Alejandro as Kevin, Mark Thompson as Reporter, Leighton Meester as Debbie Pendleton, Matt DeCaro as MTA Officer Felson, Beau Dremann as MTA Officer Marx.

(EDITOR'S NOTES: Due to the NFL Wild Card game spillover, both of tonight's MALCOLM IN THE MIDDLE episodes will air on the West Coast only; KING OF THE HILL, THE SIMPSONS, ARRESTED DEVELOPMENT and MY BIG FAT OBNOXIOUS BOSS are preempted this night; this is Day 1 of the 2-day/4-hour 24 season premiere.)