A man is detained at Grand Central Station, New York, claiming that his name is Prot and that he has come from the planet K-Pax on a fact-finding mission. He is turned over to psychiatrist Dr. Mark Powell who believes Prot to be a delusional who can easily be treated with medication. However after a series of events Powell starts to doubt his own judgement and begins to wonder whether Prot is indeed from a distance planet... Based on the novel by Charles Brewer.

A man is detained at Grand Central Station, New York, claiming that his name is Prot and that he has come from the planet K-Pax on a fact-finding mission. He is turned over to psychiatrist Dr. Mark Powell who believes Prot to be a delusional who can easily be treated with medication. However after a series of events Powell starts to doubt his own judgement and begins to wonder whether Prot is indeed from a distance planet... Based on the novel by Charles Brewer.

A man is detained at Grand Central Station, New York, claiming that his name is Prot and that he has come from the planet K-Pax on a fact-finding mission. He is turned over to psychiatrist Dr. Mark Powell who believes Prot to be a delusional who can easily be treated with medication. However after a series of events Powell starts to doubt his own judgement and begins to wonder whether Prot is indeed from a distance planet... Based on the novel by Charles Brewer.

Kevin Spacey opens up his acting box, and faces off against Jeff Bridge's shrink. The question is whether Spacey is telling the truth, or is he just plain nuts? His claim - that he's an alien. All the evidence points to him telling the truth in this cross genre film.