Peter Cushing as Emmanuel Hildern

Lorna Heilbron as Penelope Hildern

Christopher Lee as James Hildern

George Benson as Waterlow

Catherine Finn as Emily

Hedger Wallace as Doctor Perry

Duncan Lamont as Inspector

Kenneth J. Warren as Charles Lenny

Larry Taylor as Chief Asylum Warder

Harry Locke as Barman

Robert Swann as Young Aristocrat

Jenny Runacre as Marguerite Hildern

David Bailie as Young Doctor

Michael Ripper as Carter

Alexandra Dane as Bar Girl

Marianne Stone as Woman Doctor

Tony Wright as Sailor

Dan Meaden as Lunatic

Maurice Bush as Karl

Martin Carroll as Warder