Question: Who directed the 1975 British-American musical screwball comedy horror film to which "Shock Treatment" Is a follow-up film?
Sentence (from "The Rocky Horror Picture Show"): Along with O'Brien, the film stars Tim Curry, Susan Sarandon, and Barry Bostwick and is narrated by Charles Gray with cast members from the original Royal Court Theatre, Roxy Theatre, and Belasco Theatre productions.
Relevant evidence: No