When Germany invades Holland in 1940, a British intelligence officer and two Dutch diamond merchants go to Amsterdam to persuade the Dutch diamond merchants to evacuate their diamond supplies to England.
Peter Finch
as Jan Smit
Eva Bartok
as Anna
Tony Britton
as Major Dillon
Alexander Knox
as Walter Keyser
Malcolm Keen
as Johan Smit
Christopher Rhodes
as Alex
Alfred Burke
as Dealer
Melvyn Hayes
as Willem
John Horsley
as Commander Bowerman
Tim Turner
as Dutch Lieutenant
John Le Mesurier
as Colonel Janssen
Petra Davies
as Menschi
