Matthew Walker

Clark is in his barn one moment... and the next finds himself in a psychiatric hospital where he discovers he's been suffering from delusions that he came from another planet and has super-powers.

Mulder and Scully search for the truth when an anthropologist discovers what could be the frozen remains of extraterrestrial life.

A scientist working on advanced propulsion technology is killed by a disabled janitor, Roland, who then corrects the man's calculations. Mulder and Scully investigate and find that another recently deceased scientist, whose head is cryogenically frozen, was Roland's twin brother and is controlling him telepathically from beyond the grave.