It is the greatest mystery of all because no human being will ever solve it.
Immediately after their miscarriage, the US diplomat Robert Thorn adopts the newborn Damien without the knowledge of his wife. Yet what he doesn’t know is that their new son is the son of the devil.
Robert Thorn
Keith Jennings
Katherine Thorn
Monk (uncredited)
Father Brennan
Marine
Carl Bugenhagen (uncredited)
Mrs. Baylock
Father Spiletto
Thorn's Second Aide
Thorn's Aide
Nun (uncredited)
Damien Thorn
Psychiatrist
Monk
Gentleman at Rugby Match (uncredited)
Dr. Becker
Mrs. Horton
Reporter
Priest