[Answer] 9. A young couple comes across Dr. Frank N Furter's castle, a transvestite holding a convention for those from the planet Transsexual.

Step 1 : Introduction to the question "9. A young couple comes across Dr. Frank N Furter's castle, a transvestite holding a convention for those from the planet Transsexual."

...1. Transsexual 2. The Arrival 3. The Rocky Horror Picture Show 4. The Treatment "The Rocky Horror Picture Show" was released in 1975 and stars Tim Curry, Susan Sarandon and Barry Bostwick.