Alf Humphreys

When a space shuttle mission is sabotaged, Mulder suspects it may be the work of an evil extraterrestrial spirit that inhabits the body of a former Gemini astronaut.

Assuming Mulder is dead, the FBI strips Scully of her credentials for withholding information about the missing computer disk.

Mulder and Scully are stalked by an ancient legion of lethal beings while investigating a boy’s claims that he was attacked by an invisible creature.

Clark is wracked with haunting visions when he meets an old woman, Cassandra Carpenter (JACKIE BURROUGHS), who can see the future. Lex schemes to use Cassandra's gift to glimpse his own destiny and learn more about Clark's secret. Meanwhile, a bitter old man, Harry Bollston (GEORGE MURDOCK), discovers a "fountain of youth" and reverts to a teenager. He then seeks revenge on the descendants of jurors who put him in jail decades ago.