Casting
Richard Attenborough
Peter Watson
Bernard Lee
Inspector Thompson
Donald Houston
Dr. Sanderson
Dorothy Alison
Mrs. Barnes
Patricia Jessel
Mrs. Lawrence
Virginia Maskell
Helen Grey
Kenneth Griffith
Pollen
Alfred Burke
Mr. Barnes
Charles Houston
Nicholas
Maureen Connell
Eunice Blair
Amy Dalby
Miss Acres
Walter Hudd
Superintendent