Boris Karloff
Dr. Thomas Bolton
Acting
Betta St. John
Susan
Acting
Christopher Lee
Resurrection Joe
Acting
Finlay Currie
Supt. Charles Matheson
Acting
Adrienne Corri
Rachel
Acting
Francis de Wolff
Black Ben
Acting
Francis Matthews
Jonathan Bolton
Acting
Frank Pettingell
Mr. Blount
Acting
Basil Dignam
Hospital Chairman
Acting
Nigel Green
Insp. Donovan
Acting
Yvonne Romain
Rosa (as Yvonne Warren)
Acting
Howard Lang
Chief Inspector
Acting
Charles Lloyd Pack
Hardcastle
Acting
Bernard Archard
Hospital Official
Acting
Marianne Stone
Arrested Woman (uncredited)
Acting
Desmond Llewelyn
Operations Assistant (uncredited)
Acting
Skip Martin
(uncredited)
Acting