Morel's Invention (1974) is a Mystery, Science Fiction film that follows a castaway arrives on an island. He thinks it's uninhabited, but he sees a palace with also a hidden room. Soon he sees some people walking, dressed with old-fashioned clothes. He is afraid because people don't see him, like a ghost. Morel's Invention is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 6.3 out of 10 from 37 votes. Fans of mystery movies may also want to explore similar titles below.