The Undermain Theatre's latest production, Babbler, has one of the most intriguing premises in quite some time. Two bizarre individuals--one dressed as a clown, the other as a duck--are shooting a snuff film. The play is a twisted mess of sex, violence, video, and murder that investigates the masks people wear to protect themselves from others. The workshop production ends the Undermain's superb 14th season. Babbler opens Wednesday at 7:30 p.m. at The Basement Space, 3200 Main, and continues through June 6. All shows are "pay-what-you-can." Call (214) 747-5515.