Voyage To The Prehistoric Planet was originally made in The Soviet Union by Pavel Klushantsev. Somehow B-movie Icon, Roger Coreman, got a hold of it and decided to repackage it for an American release. Corman had the film reedited, added a few scenes with Basil Rathbone, and tacked on some fake opening credits to make it look like it was an American production. He couldn’t very well let the commies take the credit.