When George Lucas visited Steven Spielberg on the set of Close Encounters of the Third Kind in 1976, he was so impressed by the movie's huge sets and Spielberg's vision for it that he bet Spielberg that the film would become a bigger hit than his own space movie that he was just completing at the time. In a documentary film, Spielberg on Spielberg, which airs tonight (Monday) on Turner Classic Movies channel, Spielberg relates that he took the bet by exchanging 2.5 profit points on Close Encounters for 2.5 profits points on Lucas's film -- titled Star Wars.