Professor Kerris Bowles-Ottery
Leo McKern
Delia Brooks
Janet Munro
Inspector Butts
George Benson
Superintendent Rastleigh
Ralph Michael
Epicene
Alan Wheatley
Tom Pike
Wally Patch
The Master
Mark Dignam
Detective Inspector Armstrong
Jerome Willis
Hodges
John Sharp
Dr. Rossiter
Lloyd Pearson
Clarinda Bowles-Ottery
Maxine Audley
Dr. John Hughes
Dennis Price
Dr. Woolley
Miles Malleson
Willie Pugh-Smith
Mervyn Johns
Dr. Fisher
Leonard Rossiter
TV Make-Up Girl
Jennifer White
Mrs. Pugh-Smith
Patricia Jessel
Dr. Brass
Duncan Macrae
Writer
Robert Hamer
Music
John Barry
Director
Don Chaffey
Screenplay
Donald Taylor
Producer
Director of Photography
Gerald Gibbs
Editor
Peter Tanner
Art Direction
George Provis
Assistant Director
Dennis Bertera
Second Assistant Director
Barrie Melrose
Sound
H.L. Bird
Sound Editor
Bill Blunden
Novel
C.E. Vulliamy