Today on TV

• Buff Brides (6 p.m., Discovery Health): This new "reality" series follows several brides-to-be as they try to shape up in time for their weddings.

• Worlds Apart (6 and 10 p.m., National Geographic Channel): Leave it to National Geographic to take the "reality show" trend and turn it into something worthwhile. This new 13-part series takes American families and sends them to the most foreign of foreign lands for 10 days to live with the natives. In the premiere, a family from suburban Birmingham, Ala., travels to Ghana, where they live in a hut with members of the Frafra tribe. These are by no means tourist trips — the Americans discover what it's like to live in the Third World and come home with a decidedly different outlook on their own lives, as well as the lives of their hosts.

• Dora the Explorer (6 p.m., Nick): A special episode of this kids' series finds Dora looking for a missing star.

• Monday Night Football (7 p.m., Ch. 4): Colts at Buccaneers

• 7th Heaven (7 p.m., Ch. 30): Kevin doesn't cope well when he has to go on medical leave.

• Killer Instinct: From the Files of Agent Candice DeLong (7 p.m., Lifetime): Really bad TV movie about an FBI profiler (Jean Smart) who pursues and is pursued by a serial killer. It's supposed to be fact-based, but it plays out like ridiculous fantasy.

• Everybody Loves Raymond (8 p.m., Ch. 2): Michael refuses to go to school, so Ray takes him to work, hoping to bore him back into the classroom. (Hey, Ray is a sportswriter, so it seems logical.)

• Horatio's Drive: America's First Road Trip (8 p.m., Ch. 7): Documentarian Ken Burns re-creates the 1903 California-to-New York trip undertaken by Horatio Nelson Jackson (voiced by Tom Hanks) — the first known cross-country journey by motorcar.

• Everwood (8 p.m., Ch. 30): Linda starts practicing alternative medicine, which doesn't sit well with decidedly non-alternative Harold.

• Two and a Half Men (8:30 p.m., Ch. 2): When Jack gets sick, he wants his mommy.

• CSI: Miami (9 p.m., Ch. 2): Horatio takes the vicious attack on a young woman personally.

• Third Watch (9 p.m., Ch. 5): Nia Long joins the cast as a new police officer.

• Enigma (10 p.m., Showtime): Kate Winslet and Dougray Scott star in this fact-based 2001 thriller set during WWII. (Rated R)