Question: Who aired the 140th episode of the series overall that was the first after the departure of actor Isaac Hayes, after the episode Stan joins Scientology in an attempt to find something "fun and free"?
Sentence (from "Trapped in the Closet (South Park)"): The title is a reference to the R. Kelly serialized song of the same name and a satirized version of R. Kelly appears in the episode.
Relevant evidence: No