SAM AND RAY FIND THEMSELVES LINKED TO A SERIES OF DECAPITATIONS THAT HAVE THE PRECINCT IN A FRENZY, ON ABC'S "LIFE ON MARS"

The Critically Acclaimed Series Returns on a New Night � Wednesday, January 28 � Following ABC's Hit Series, "Lost"

"The Dark Side of the Mook" � Sam Tyler receives a mysterious phone call that leads to a headless body. Simultaneously Lt. Hunt finds a severed head delivered in a gift box to the precinct, which sets off the discovery of a chain of bizarre decapitations. Meanwhile, Ray's ne'er-do-well brother, Eddie, may be entangled with the murders, but the peculiar situation leads the 1-2-5 to a biker, a Wall Street bigwig and a terribly disfigured man. As Sam, Hunt and the rest of the detectives sort out these hideous crimes, Ray makes a life-changing decision, and Sam makes an extraordinary discovery about the original tipster phone call, on "Life on Mars," premiering on its new night, WEDNESDAY, FEBRUARY 4 (10:02-11:00 p.m., ET) on ABC Television Network.

"Life on Mars" stars Jason O'Mara as Detective Sam Tyler, Harvey Keitel as Lieutenant Gene Hunt, Michael Imperioli as Detective Ray Carling, Gretchen Mol as Annie Norris and Jonathan Murphy as Detective Chris Skelton.

Guest starring is Eric Balfour as Eddie Carling, Kevin Conway as Donovan Stamp, Joseph McKenna as disfigured man, John Cenatiempo as Sizable Ted, Tanya Fischer as Windy, Diedre Goodwin as nurse, Joel Marsh Garland as Seven Fifty, Bridget Berger as biker chick, Antonia Rey as Latina woman and Guy Paul as Willis Ashton.

"The Dark Side of the Mook" was written by Brian Oh & Tracy McMillan and directed by Rick Rosenthal.

"Life on Mars" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound and Spanish subtitles via secondary closed captioning. This program carries a TV-14,L,V parental guideline.

This episode of "Life on Mars" will be available on ABC.com the day after airing on the network for users to watch online.