Read no further if you are participating in National TV-Turnoff Week (today through Sunday), sponsored by TV-Free America. But if you can't resist . . .
* "Star Trek: Voyager" (8 p.m.-9 p.m., WNUV, Channel 54) -- An alien assumes control of the holodeck and begins turning the ship's crew into pure energy. Who can stop him? The ship's doctor (Robert Picardo) who, as merely a holographic image, is not a life form. UPN.
* "Melrose Place" (8 p.m.-9 p.m., WBFF, Channel 45) -- Continuing the clever ploy of repeats reprising the debut appearances of certain characters, Sydney (Laura Leighton) moves in on sister Jane (Josie Bissett), in more ways than one. From January 1993. FOX.
* "The Nanny" (8 p.m.-8:30 p.m., WJZ, Channel 13) -- Traveling to Atlantic City for a canasta tournament in this funny repeat, Fran (Fran Drescher) runs into guest stars Steve Lawrence and Eydie Gorme. But she mistakes them for impersonators -- and bad impersonators, at that. CBS.
* "Seduced and Betrayed" (9 p.m.-11 p.m., WBAL, Channel 11) -- She's sooo bad! That's Susan Lucci, of course, the vixen of the soap opera "All My Children." In this new TV movie, with Gabrielle Carteris ("Beverly Hills, 90210"), she plays a widow obsessed with revenge against a carpenter who spurns her (David Charvet, of "Baywatch"). NBC.
* "Baseball" (9 p.m.-11 p.m., MPT, Channels 22, 67) -- The second installment of the nine-"inning" repeat of Ken Burns' documentary includes profiles of such superstars as Ty Cobb and Christy Mathewson. PBS.
* "Northern Exposure" (10 p.m.-11 p.m., WJZ, Channel 13) -- Back in their old time slot (for one time only), the denizens of Cicely rehearse for a production of "Bus Stop," in which Chris (John Corbett) is finally going to have a chance to kiss Maggie (Janine Turner). CBS.
* "Biography: The Babe" (8 p.m.-9 p.m., Arts & Entertainment) -- There was only one, and Baltimore has claimed him as a native son because Yankees star George Herman Ruth played his earliest ball here. He was a pitcher first, before swatting all those home runs.