When do art and politics meet -- and which should take precedence? A PBS presentation of a fascinating documentary on German film pioneer Leni Riefenstahl poses the question.
* "The Wonderful, Horrible Life of Leni Riefenstahl" (8 p.m.-11 p.m., MPT, Channels 22, 67) -- The filmmaker wrote in her memoirs that she once told Adolf Hitler she could never make political films. Yet she eventually produced movies that critics charged extolled the Third Reich -- including a documentary on the 1936 Berlin Olympic Games, which won a Golden Lion film award at the Venice Film Festival, ahead of Disney's "Snow White." Ray Muller's 1993 film biography includes an interview with the unrepentant 90-year-old filmmaker. PBS.
* "Christy" (8 p.m.-9 p.m., WJZ, Channel 13) -- When her class is quarantined for scarlet fever, Christy (Kellie Martin) intercedes in this new episode with Dr. MacNeill (Stewart Finlay McKennan), as she persuades him to accept help from newcomer Daniel (LeVar Burton). CBS.
* "Opening Ceremonies, 1995 Special Olympics World Games" (8 p.m.-10 p.m., WBAL, Channel 11) -- Taped over the weekend at the Yale Bowl in New Haven, Conn., the broadcast of the festivities surrounding the annual competition for mentally handicapped youngsters features host Bob Costas. Included are appearances by Ruben Blades, Arnold Schwarzenegger, Sandra Bullock, Jean-Claude Van Damme and Hootie and the Blowfish. NBC.
* "Northern Exposure" (9 p.m.-10 p.m., WJZ, Channel 13) -- Although a spate of new episodes followed, the soul went out of the show with this February episode, Rob Morrow's farewell. Fleischman persuades Maggie (Janine Turner) to go along on a quest for a mythical jeweled city. And deep in the woods, he spies the object of his quest, and his fate -- Manhattan? CBS.
* "Kung Fu: The Legend Continues" (9 p.m.-10 p.m., WNUV, Channel 54) -- Can you believe it, Grasshopper? This is a new episode of the syndicated revival of the original series (1972-1975) -- although the plot seems a lot like "Indiana Jones and the Last Crusade." Caine (David Carradine) struggles to keep from German hands a diary that reveals the location of a magical chalice.
* "Star Wars" and "Star Trek: The Motion Picture" (8 p.m.-10:30 p.m., USA, and 8:05 p.m.-11:05 p.m., TBS) -- Wow! These dueling space epics from the late 1970s ushered in the modern era of sci-fi films. The first (1977), from George Lucas and Steven Spielberg, has the edge in purely visual terms. But the latter (1979), the first film reunion of the Enterprise crew, plays with a deeper idea: What might happen to our space probes if they were to encounter a race of superior intellect out there?