Vincent Price
Paul Toombes
Peter Cushing
Herbert Flay
Robert Quarry
Oliver Quayle
Linda Hayden
Elizabeth Peters
Michael Parkinson
T.V. Interviewer
Ellis Dayle
Alfred Peters (as Ellis Dale)
Catherine Willmer
Louise Peters
Jenny Lee Wright
Carol Clayton
John Garrie
Inspector Harper
Peter Halliday
Psychiatrist
Basil Rathbone
Basil (archive footage)
Boris Karloff
(archive footage)
Hyma Beckley
Passenger on Quayside (uncredited)
George Blackler
George the Make-Up Artist (uncredited)
Robert Cawdron
CID Inspector (uncredited)
Michael Craze
Reporter (uncredited)
David Jackson
Police Sergeant (uncredited)
Patrick Jordan
Ship's Steward (uncredited)
Earl Rhodes
Boy Fishing (uncredited)
Pam Rose
Pretty Blonde (uncredited)
Christopher Sandford
Reporter (uncredited)
Reg Thomason
Hollywood Party Guest (uncredited)
