Boris Karloff

Dr. Thomas Bolton

Betta St. John

Susan

Christopher Lee

Resurrection Joe

Finlay Currie

Supt. Charles Matheson

Adrienne Corri

Rachel

Francis de Wolff

Black Ben

Francis Matthews

Jonathan Bolton

Frank Pettingell

Mr. Blount

Basil Dignam

Hospital Chairman

Nigel Green

Insp. Donovan

Yvonne Romain

Rosa (as Yvonne Warren)

Howard Lang

Chief Inspector

Charles Lloyd Pack

Hardcastle

Bernard Archard

Hospital Official

Marianne Stone

Arrested Woman (uncredited)

Desmond Llewelyn

Operations Assistant (uncredited)

Skip Martin

(uncredited)