Vincent Price
Paul Toombes
Peter Cushing
Herbert Flay
Robert Quarry
Oliver Quayle
Adrienne Corri
Faye
Linda Hayden
Elizabeth Peters
Natasha Pyne
Julia Wilson
Michael Parkinson
T.V. Interviewer
Barry Dennen
Gerry Blount
Ellis Dayle
Alfred Peters (as Ellis Dale)
Catherine Willmer
Louise Peters
Jenny Lee Wright
Carol Clayton
Julie Crosthwaite
Ellen
John Garrie
Inspector Harper
Ian Thompson
Bradshaw
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)
Jim Clark
Director
Ken Levison
Screenplay
Greg Morrison
Screenplay
Samuel Z. Arkoff
Executive Producer
Max Rosenberg
Producer
Milton Subotsky
Producer
John Dark
Associate Producer
Douglas Gamley
Music
Ray Parslow
Cinematography
Clive Smith
Editor
Rose Tobias Shaw
Casting
Tony Curtis
Art Direction
George Blackler
Makeup Artist
Helen Lennox
Hairdresser
Pat Green
Production Manager
Allan James
First Assistant Director
John Siddall
Assistant Art Director
Bill Waldron
Construction Manager
Ken Coles
Camera Operator
Ruggero Salvadori
Production Manager
Michael Green
Third Assistant Director
Nigel Wooll
Second Assistant Director
Danny Daniel
Sound Recordist
Peter Horrocks
Sound Editor
Gerry Humphreys
Sound Recordist
Norman Kerss
Special Effects
Roy Spencer
Special Effects
Ian Smith
Clapper Loader
Dulcie Midwinter
Wardrobe Master
Lorna Selwyn
Continuity