Douglas Kennedy
as
Faust
Patrick Cranshaw
as
Security Guard
Charles Evans
as
Bruce McDonald
Forbes Murray
as
Lawyer
Diana Lynn
as
Martha Burnside / Mallory Flagg
Jay Adler
as
Bartender Louie
Harry Harvey
as
Gas Station Attendant
Hank Patterson
as
Medical Examiner
Jason Robards Sr.
as
Dr. Bill Hall
Harry Myers
as
Nat Franklin
Eddie Hall
as
Tony - Used-Car Lot Mechanic Inspecting Car
Ann Savage
as
Vera
John Carradine
as
Cult Organist
Boris Karloff
as
Hjalmar Poelzig
Harry Cording
as
Thamal
William Schallert
as
Dr. Mears
Harold Gould
as
Frightened villager
Charles Davis
as
Geordie - Man at Dock
Remo De Angelis
as
Terence Hill
as
Quintilius
Bud Spencer
as
Rutario
Benito Stefanelli
as
Wrestler