For generations of Americans, tuberculosis was a serious health threat -- and it hasn't entirely gone away, according to a new PBS documentary airing tonight. Jay Leno also has international newsmaker Harry Wu as a scheduled guest.
* "Maryland Connections" (7:30 p.m.-8 p.m., Channels 22, 67) -- This local production was made to accompany the three-part PBS series "The American Promise" (continuing at 8 p.m.). It profiles three individuals in this region who demonstrate grass-roots democracy, including a Hispanic immigrant who helps others in Montgomery County; a Columbia woman who aids people with hearing or mobility impairments; and a Washington man who has adopted troubled teens. MPT.
* "The Fresh Prince of Bel-Air" (8 p.m.-8:30 p.m., WBAL, Channel 11) -- Here's an old, old sitcom plot: Will (Will Smith) tries to help Hilary (Karyn Parsons) beat a cold but gives her too much medicine -- just before a big meeting. NBC.
* "Star Trek: Voyager" (8 p.m.-9 p.m., WNUV, Channel 54) -- Boy, it's just one thing after another out there in the cosmos. The starship encounters one of those pesky spatial distortions that threatens to twist the ship like a pretzel. UPN.
* "Fight for Justice: The Nancy Conn Story" (9 p.m.-11 p.m., WBAL, Channel 11) -- Marilu Henner took a break from her talk show to star in a fact-based new movie as a woman who survives an attack but feels newly imperiled when the man escapes from prison. NBC.
* "The People's Plague: Tuberculosis in America" (9 p.m.-11 p.m., MPT, Channels 22, 67) -- Did you know that one-third of the world's population is infected with the bacterium that causes this disease? Although tuberculosis was nearly wiped out in the United States. with the development of antibiotics in the 1950s, according to this documentary the disease in recent years has staged a modest comeback in this country, with 25,000 new cases last year. PBS.
* "The Tonight Show with Jay Leno" (11:35 p.m.-12:35 a.m., WBAL, Channel 11) -- You've got to admire the bookers for this talk show, which has been surging in the ratings. They've landed Chinese-American activist Harry Wu, recently detained for two months in his native country. NBC.
* "Laurel & Hardy Marathon" (Midnight Sunday-6 a.m. tomorrow, AMC) -- The vintage film network launched its Third Annual Film Preservation Festival last night with a 30-hour marathon of films, shorts and other works.