4 films match K-PAX

Prot is a patient at a mental hospital who claims to be from a far away planet. His psychiatrist tries to help him, only to begin to doubt his own explanations. (imdb)

The film deals with the issue of space weapons and their politics, featuring interviews with several key United States military personal, academics and others.

A king dies and a war between two close nations start.

In a neighborhood on the outskirts of Rome the crime, drugs and graffiti are pervasive. A large apartment complex seems to be a prison for the inhabitants. Marco returns to the hood after serving time in prison for dealing drugs but he's rejected and abandoned by his wife. His old friends still want him to deal cocaine for them. At first he's reluctant but it seems to be all he knows to do.