Psychiatric patient Prot (Kevin Spacey) seems remarkably sane, except for his assertion that he's really an alien visitor from a distant planet named K-Pax. It's Starman meets One Flew Over The Cuckoo's Nest (in a nicely ironic piece of casting, Jeff Bridges plays the psychiatrist determined to discover Prot's real identity), and works nicely even if it does err on the side of sentimentality.