Michael York

Geoffrey Richter-Douglas

Elke Sommer

Erika Altschul

Peter Carsten

Major Tauntler

Marius Goring

Professor Christian Altschul

Anton Diffring

Colonel Hirsch

Andrew Keir

Von Gorian

Rupert Davies

Captain Whitney

Alexandra Stewart

Stephanie

William Marlowe

Anderson

Alan Rothwell

Brandner

Richard Hurndall

Blinker Hall

John Gill

Meier

Michael Robbins

Cockney Sergeant

Ben Howard

Jamie Fergusson

George Mikell

German Officer

Arnold Diamond

Major Proudfoot

Clive Morton

Lord Delford

Bryan Coleman

Colonel Whippen

Gary Waldhorn

Harlich

Ronald Adam

Prime Minister

Frazer Hines

Radio Operator

Ruth Kettlewell

Mrs. Parker

Ray Lonnen

Sgt. Grant

Dorian Healy

Child (uncredited)

Gerry Johnston

Special Effects Supervisor

Kip Gowans

Assistant Director

Neville Smallwood

Makeup Supervisor

Charles Hammerton

Construction Manager

Claude Hudson

Production Manager

Brenda Dabbs

Wardrobe Supervisor

J. Ronald Getty

Executive Producer

Colin Jamison

Hairdresser

Rita Davison

Continuity

Charles Staffell

Special Effects

Brian West

Second Unit Cinematographer

Roy Budd

Original Music Composer

Lesley De Pettit

Casting Director

Bernard Hanson

Location Manager

Cliff Culley

Additional Camera

Roy Budd

Conductor

Herbert G. Luft

Finance

Wally Veevers

Special Effects

Friedrich Sturm

Technical Advisor

Étienne Périer

Director

Bert Davey

Art Direction

Arthur Taksen

Set Decoration

Vernon Messenger

Sound Editor

Sue Yelland

Costume Design

Ginger Gemmel

Camera Operator

Arthur Rowe

Screenplay

Owen Crump

Story

Alan Hume

Director of Photography

Owen Crump

Producer

John Shirley

Editor

Donald Churchill

Screenplay

Derek V. Browne

Camera Operator

Cliff Richardson

Special Effects

Les Wiggins

Sound Editor

C. Le Mesurier

Sound Recordist

Gordon Everett

Sound Recordist