In Back to the Future, a DeLorean and a lightning bolt just barely made time travel possible. By the time Time Chasers was made, time travel only required the eight bits of computing power in a Commodore 64, plus a Cessna airplane. Or at least that's the set-up in the 1994 "action" film, which was mercilessly savaged by the Mystery Science Theater 3000 crew on their much-missed TV show. Mike Nelson, Kevin Murphy and Bill Corbett (MST3K vets all) return to the film to riff it a new one in a special encore presentation of a previously recorded RiffTrax Live event. Can a man fly through time to stop an evil corporation from ruining the future and also find love on the way? Only if he covers that deeply cleft chin with some chinderwear first. RiffTrax: Time Chasers screens at 7:30 p.m. tonight at Wehrenberg Ronnies 20 (5320 South Lindbergh Boulevard; www.fathomevents.com). Tickets are $14.