Patrick Macnee

Derek Longbow

Edward Woodward

Dr. Holstrom

Alexander Davion

Tony Seymore

Peter Cushing

Dr. Walter Goodrich

Johnny Sekka

Bob Kirby

Madeleine Hinde

Penelope

William Mervyn

Marc Honeydew

Patrick Mower

Richard Fountain

David Lodge

Colonel

Imogen Hassall

Chriseis

Valerie Van Ost

Don's Wife

Françoise Pascal

Girl at Orgy (uncredited)

Marianne Stone

Cheerful Lady at Party (uncredited)

Julian More

Director

Robert Hartford-Davis

Director

George Provis

Production Design

Tony Dawe

Sound Recordist

Don Deacon

Dialogue Editor

Robert Richards

Music

Peter Newbrook

Executive Producer

Dennis Whitlock

Sound Recordist

Ronnie Maasz

Camera Operator

Maxine Julius

Assistant Editor

Peter Thornton

Editor

Graham Harris

Producer

Julian More

Screenplay

Desmond Dickinson

Director of Photography