Mary Lynn Rajskub, from left, Kiefer Sutherland, and executive producers Howard Gordon, Evan Katz, Brian Grazer and Manny Coto attend the panel for "24: Live Another Day" at the FOX Winter 2014 TCA, on Monday, Jan. 13, 2014, at the Langham Hotel in Pasadena, Calif. (Photo by Richard Shotwell/Invision/AP)

Jack Bauer is back, and he's on the run in London.

Kiefer Sutherland returns as the intrepid counter-terrorist in a 12-episode run of "24: Live Another Day," debuting May 5 on Fox.

The actor says he's "anxious" about returning to a character he played for eight seasons, from 2001 to 2010.

The show will be set and shot in London and retain the real-time format with split screens and interwoven story lines.

Also back from the original series are Mary Lynn Rajskub, Kim Raver and William Devane. Several newcomers have joined the cast, including Oscar nominee Judy Davis and Yvonne Strahovski of "The Wire."

Rajskub, who plays Chloe, says she closely followed Internet speculation about the series return and waited eagerly to find out whether she'd be included.