German actor Peter van Eyck stars as Droste, a mild-mannered businessman who was an intelligence expert during World War II. When Droste runs into his old friend Baron Von Straub (Christopher Lee), 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
Niall MacGinnis
as Paul Vass
Eric Pohlmann
as Bloch