Derek Longbow

Patrick Macnee

Acting

Dr. Holstrom

Edward Woodward

Acting

Tony Seymore

Alexander Davion

Acting

Dr. Walter Goodrich

Peter Cushing

Acting

Bob Kirby

Johnny Sekka

Acting

Penelope

Madeleine Hinde

Acting

Marc Honeydew

William Mervyn

Acting

Richard Fountain

Patrick Mower

Acting

Colonel

David Lodge

Acting

Chriseis

Imogen Hassall

Acting

Don's Wife

Valerie Van Ost

Acting

Girl at Orgy (uncredited)

Françoise Pascal

Acting

Cheerful Lady at Party (uncredited)

Marianne Stone

Acting