The movie marquee twinkles invitingly tonight, especially for the cable-connected, who have some difficult choices among films that qualify as classics. * "Twins" (8 p.m.-10 p.m., WNUV, Channel 54) -- Revealing Arnold Schwarzenegger's surprising softer side, and foreshadowing last year's under-appreciated "Junior," this 1988 hit pairs the big guy with the little guy: Danny DeVito. They're unlikely twins, product of a genetics experiment, and their touching search for their mother teaches them both some nice things. WNUV. * "Mystery!" (9 p.m.-11 p.m., MPT, Channels 22, 67) -- New Zealand writer Dame Ngaio Marsh's diplomatically trained Chief Detective Inspector Roderick Alleyn (Patrick Malahide) returns in the first of two new dramas. In "Death in a White Tie," attempting to find a blackmailer who is preying on London, he instead discovers murder. PBS. * "New York Undercover" (9 p.m.-10 p.m., WBFF, Channel 45) -- Guest star Ben Vereen plays Louie, best friend of Eddie (Michael DeLorenzo), who seems to be involved in a drug deal with crooked cops. Fox. * "ER" (10 p.m.-11 p.m., WBAL, Channel 11) -- Reporters, cops and emergency room workers swear a full moon brings wacky problems. In this episode, the physicians deal with a man with chronic hiccups, a pregnant astrologer and a patient who needs an internal heart massage. Worse, a new chief surgeon arrives, played by frequent movie villain Michael Ironside. NBC. Cable * "The Inn of the Sixth Happiness" (8 p.m.-11 p.m., American Movie Classics) -- Ingrid Bergman beams determined, radiant compassion in this 1958 hit, portraying real-life missionary Gladys Aylward, who rescues a group of orphaned children in wartime China. With Curt Jurgens and Robert Donat. * "Splendor in the Grass" (8 p.m.-10:50 p.m., TNT) -- Do you care that talk show titan Ricki Lake (who serves as host for the screening) counts this as one of her favorites? She's not alone, however, for Natalie Wood (nominated for an Oscar) and Warren Beatty (in his film debut) epitomized the trials of young romance when parents do not approve, in this 1961 Elia Kazan movie. * "Manhattan Murder Mystery" (8 p.m.-10 p.m., Showtime) -- OK, Woody Allen's "Bullets Over Broadway" was largely shut out at the Oscars, save for Dianne Wiest's award for best supporting actress. But here's a chance to see his previous clever comedy, with a classic Allen cast, including himself, Diane Keaton, Alan Alda, Anjelica Huston and Joy Behar.