After witnessing a man's death in a bizarre accident, Father Pergado goes on a spiritual retreat, where he encounters his alien double bent on world conquest.
Christopher Lee
as Father Pergado / Zindar
Sue Lyon
as Sylvia Boran
Kirk Scott
as Prof. Boran
Dean Jagger
as Ray Collins
Lew Ayres
as Com. Joseph Beckerman
Macdonald Carey
as John Davis
Liz Ross
as Patrizia
Jon Van Ness
as Mr. Sanchez
Kathe Cunha
as Nun / Alien
Mary Daugherty
as Nun / Alien
Evelyn Lipton
as Nun / Alien
Jane Wilbur
as Nun / Alien
