Patrick Macnee
Derek Longbow
Acting
Edward Woodward
Dr. Holstrom
Acting
Alexander Davion
Tony Seymore
Acting
Peter Cushing
Dr. Walter Goodrich
Acting
Johnny Sekka
Bob Kirby
Acting
Madeleine Hinde
Penelope
Acting
William Mervyn
Marc Honeydew
Acting
Patrick Mower
Richard Fountain
Acting
David Lodge
Colonel
Acting
Imogen Hassall
Chriseis
Acting
Valerie Van Ost
Don's Wife
Acting
Françoise Pascal
Girl at Orgy (uncredited)
Acting
Marianne Stone
Cheerful Lady at Party (uncredited)
Acting