Girlfriends

Life on Mars: Familiar TV face Jason O'Mara, who did guest stints this season on Men in Trees and Grey's Anatomy, takes another crack at headlining a series in this adaptation of the BBC cult hit about a modern-day detective who finds himself mysteriously transported to 1973.

Terminator: The Sarah Connor Chronicles: John (Thomas Dekker) gets separated from his protectors, mom Sarah (Lena Headey) and friend Cameron (Summer Glau), which isn't a good thing, because the women are much tougher than he is. 8 p.m., KDFW/Channel 4