"George Lucas: We made Temple Of Doom a prequel because we didn't want to use the same bad guys. We had ideas about the Monkey King. We had ideas for a haunted-castle movie but then Steve had just done Poltergeist and said, "I don't wanna do that again." We were struggling to come up with another MacGuffin. We couldn't find anything as good as the Lost Ark. We ended up with the Sankara Stones, which was a little obscure."