You know that Christopher Reeve played Superman in four movies in the 1970s and ’80s. And you know he didn’t get to wear a suit that enhanced his muscles like many of the movie superheroes that came after him. But did you know that Reeve got into shape to play the Man of Steel by using a training regimen supervised by none other than David Prowse, the man who played Darth Vader in the original Star Wars trilogy? It’s true, and it’s just one of the facts featured in the latest installment of You Think You Know Movies!