Synopsis

After a mysterious man calling himself Prot is brought to a Manhattan psychiatric facility, he claims to be an alien from the distant planet K-PAX. His calm manner and astonishing astronomical knowledge challenge psychiatrist Mark Powell, who begins investigating the stranger's identity. As Prot influences the other patients and prepares to leave Earth, Powell must decide whether he is treating a delusional man or encountering something genuinely extraordinary.

Factoids & Trivia

• K-PAX is based on Gene Brewer's 1995 novel of the same name, the first book in a series about Prot and his psychiatrist.

• The film reportedly took more than seven years to reach production. Producer Lawrence Gordon said the unusual blend of science fiction, psychological drama, and ambiguity made it difficult to interest studios.

• The production used locations in New York and California. The planetarium scenes were filmed at the Rose Center for Earth and Space in Manhattan, while other sequences were shot around Los Angeles, Sierra Madre, Kernville, and Red Rock Canyon State Park.

• The filmmakers described the story as a modern fable rather than a conventional alien-invasion movie. Its central mystery deliberately supports competing interpretations, allowing viewers to decide whether Prot is an extraterrestrial or a troubled human being.

• The film's promotional slogan was "Change the way you look at the world," reflecting its emphasis on perspective, empathy, and the limitations of accepted reality.

• Argentine filmmaker Eliseo Subiela publicly alleged that K-PAX closely resembled his 1986 film Man Facing Southeast, which also centers on an enigmatic psychiatric patient who claims to come from another world. The claim became a notable controversy surrounding the film's release.