Celebrities old and new are all over the place tonight. Current stars can be found on an ABC special and "Late Show With PTC David Letterman," while cable's "Biography" offers a look at Marilyn Monroe.
* "Off Camera With Dean Cain" (8 p.m.-9 p.m., WMAR, Channel 2) -- The young superhero from "Lois & Clark" demonstrates prodigious powers, for he's credited as host, writer, director and executive producer of this special featuring his interviews with other young celebrities. Included are Andrew Shue ("Melrose Place"), Daphne Zuniga ("Melrose Place"), Matthew Fox ("Party of Five") and his own girlfriend, model Gabrielle Reece. ABC.
* "A Family Torn Apart" (9 p.m.-11 p.m., WBAL, Channel 11) -- Fresh from his fresh-faced role on "Doogie Howser, M.D.," Neil Patrick Harris starred in this 1993 TV movie as an adoptive son suspected of killing his parents. With Johnny Galecki ("Roseanne") and Gregory Harrison. NBC.
* "Battlefield: The Battle of Normandy" (10 p.m.-midnight, MPT, Channels 22, 67) -- It's better known as D-Day, and the massive amphibious assault marked the beginning of the Allies' march to liberate the occupied nations of Europe. PBS.
* "Late Show With David Letterman" (11:35 p.m.-12:35 a.m., WJZ, Channel 13) -- A week or so ago, David Letterman barely alluded to the breakup of Julia Roberts' marriage when she was a guest. Will he be as reserved tonight with her former hubby, singer Lyle Lovett? CBS.
* "Absolutely Fabulous" (8 p.m.-8:30 p.m., Comedy Central) -- This British comedy, featuring anti-heroines Joanna Lumley, Jennifer Saunders and Julia Sawalha, ended its run on the BBC in May, and tonight the last episode airs on the all-comedy cable service.
* "Biography: Blonde Ambition Week" (8 p.m.-9 p.m., A&E; Network) -- Usually pretty staid, the documentary series launches a five-day run of pinup profiles, leading off with Marilyn Monroe. In the days to come: Madonna, Mae West, Jayne Mansfield and Betty Grable.