
"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

Katherine Thorn

Keith Jennings

Mrs. Baylock

Damien Thorn

Father Brennan

Father Spiletto

Monk

Priest

Psychiatrist

Young Nanny

Dr. Becker

Reporter

Mrs. Horton

Horton

Thorn's Aide

Thorn's Second Aide

Photographer
Chambermaid
Nurse
First Nun

American Secretary

Marine

Secret Service Man (uncredited)

Gentleman at Rugby Match (uncredited)

Italian Taxi Driver (uncredited)

Nun (uncredited)

Arab (uncredited)
Man Walking across Street (uncredited)
Monk (uncredited)

Carl Bugenhagen (uncredited)

General (uncredited)
Rugby Match Spectator (uncredited)

Rugby Match Spectator (uncredited)
Guest at Damien’s Birthday Party
Boy (uncredited)
Monk (uncredited)
Rugby Match Spectator
Hospital Orderly
Man Buying Ice Cream at Safari Park (uncredited)