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.
Michael York
Elke Sommer
Peter Carsten
Marius Goring
Anton Diffring
Andrew Keir
Rupert Davies
Alexandra Stewart
William Marlowe
Alan Rothwell
Richard Hurndall
John Gill
Michael Robbins
Ben Howard
George Mikell
Arnold Diamond
Clive Morton
Bryan Coleman
Gary Waldhorn
Ronald Adam
Frazer Hines
Ruth Kettlewell
Ray Lonnen