Droste, a mild-mannered businessman, was an intelligence expert during World War II. When Droste runs into his old friend Baron Von Straub, the two rekindle a friendship that was interrupted by the war. However, when Von Straub asks Droste to deliver a small package to a friend in West Germany, the befuddled Droste is set up for a series of complicated spy games.

Peter van Eyck
as Georg Droste

Marianne Koch
as Nora Gulden

Macdonald Carey
as Mr. Smith

Christopher Lee
as Baron Ferdi von Staub

Billie Whitelaw
as Piroska Maslov

Albert Lieven
as Inspector Huebling

David Knight
as Father Zombary

Marius Goring
as General Greenhahn

Helen Cherry
as Countess Carla Cosimano

Colin Gordon
as Count Dezsepalvy