The outbreak of World War I places Scots officer Geoffrey Richter-Douglas in an uncomfortable position. Although his allegiance is to Britain, his mother was from an aristocratic Bavarian family, and he spent his summers in Germany as a child. When Geoffrey is approached by a German spy who offers him a chance to defect, he reports the incident to his superiors, but instead of arresting the spy they suggest that he accept her offer--and become an Allied agent. In Germany, among old friends, Geoffrey discovers that loyalty is more complicated than he expected, especially when he finds himself aboard the maiden voyage of a powerful new prototype Zeppelin, headed for Scotland on a secret mission that could decide the outcome of the war.
Cast
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)
Crew
Étienne Périer
Director
Arthur Rowe
Screenplay
Donald Churchill
Screenplay
Owen Crump
Story, Producer
John Shirley
Editor
Alan Hume
Director of Photography
Kip Gowans
Assistant Director
J. Ronald Getty
Executive Producer
Ginger Gemmel
Camera Operator
Derek V. Browne
Camera Operator
Cliff Culley
Additional Camera
Lesley De Pettit
Casting Director
Brenda Dabbs
Wardrobe Supervisor
Sue Yelland
Costume Design
Colin Jamison
Hairdresser
Neville Smallwood
Makeup Supervisor
Brian West
Second Unit Cinematographer
Vernon Messenger
Sound Editor
Les Wiggins
Sound Editor
C. Le Mesurier
Sound Recordist
Gordon Everett
Sound Recordist
Gerry Johnston
Special Effects Supervisor
Charles Staffell
Special Effects
Wally Veevers
Special Effects
Cliff Richardson
Special Effects
Roy Budd
Original Music Composer, Conductor
Herbert G. Luft
Finance
Arthur Taksen
Set Decoration
Charles Hammerton
Construction Manager
Friedrich Sturm
Technical Advisor
Bernard Hanson
Location Manager
Rita Davison
Continuity
Claude Hudson
Production Manager
Bert Davey
Art Direction
