SAM'S ATTEMPT TO SAVE A WOMAN UNDER ATTACK LURES HIM BACK INTO HIS PAST, AS HE COMES FACE TO FACE WITH HIS YOUNGER MOTHER, WHILE LEADING THE 1-2-5 TO RE-INVESTIGATE PAST MURDERS OF FEMALES LINKED TO LOCAL GANGSTERS, ON ABC'S "LIFE ON MARS"

Robert Klein Guest Stars as Mob Boss Elliot Casso

"Have You Seen Your Mother, Baby, Standing in the Shadows?" � Sam is unwillingly but hypnotically pulled back into his childhood when he becomes entangled in local gangster Nick Profaci's assault on a young, beautiful woman. Sam is amazed to discover that the woman, who is oddly familiar to him, is actually his mother back in 1973. While he anxiously attempts to save her, he uncovers two unsolved murders of women that possibly point to the involvement of Profaci and his mob boss, Elliot Casso's. But even more alarming is the discovery that members of the 1-2-5 � including Lt. Hunt � may be mixed up with Casso and his crew and may have prevented justice from being carried out, on "Life on Mars," THURSDAY, OCTOBER 30 (10:01-11:00 p.m., ET) on the 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 are Robert Klein as Elliot Casso, Jennifer Ferrin as Rose Tyler, Tanya Fischer as Windy, Lenny Venito as Nick Profaci, Odette Yustman as Adrienne, Christian & Caleb Wallace as young Sammy, John Cenatiempo as Sizable Ted, Emerald Young as Lullaby Girl, Don Puglisi as Jim Croce, Kay Walbye as Adrienne's mom and Laura Kautza as Jilly.

"Have You Seen Your Mother, Baby, Standing in the Shadows" was written by David Wilcox and directed by Alex Zakrzewski.

"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. A TV parental guideline will be posted closer to airdate.

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