You may think you're a big "Harry Potter" fan, but are you a "fanaddict"? Those are the superfans featured on this series, narrated by legendary "Batman" actor Adam West. The reality show goes inside some of the world's most impressive collections of movie memorabilia and shines the spotlight on the fans who stop at nothing to obtain new items related to their favorite films. Featured collections include memorabilia associated with the "Harry Potter," "Star Wars," "Superman" and "Star Trek" franchises as well as "E.T." and "The Wizard of Oz." Some fans, however, choose to sell a portion of their beloved items to earn extra cash.