From gender-bending British stage show to Hollywood misfire-turned-enduring midnight screening draw, "Rocky Horror" remains an audience-pleasing cult phenomenon with no sign of slowing down even after half a century. Documentarian Linus O'Brien-son of co-creator/"Riff Raff" Richard O'Brien-delivers an all-encompassing look back, with input from cast, crew, and devotees; Tim Curry, Susan Sarandon, Barry Bostwick, Nell Campbell, Patricia Quinn, Peter Hinwood, many more appear. 89 min. Widescreen; Soundtrack: English.