During the Cold War, an American scientist appears to defect to East Germany as part of a cloak and dagger mission to find the formula for a resin solution, but the plan goes awry when his fiancee, unaware of his motivation, follows him across the border.
Michael Armstrong
Paul Newman
Sarah Sherman
Julie Andrews
Countess Kuchinska
Lila Kedrova
Heinrich Gerhard
Hansjörg Felmy
Ballerina
Tamara Toumanova
Gustav Lindt
Ludwig Donath
Hermann Gromek
Wolfgang Kieling
Karl Manfred
Günter Strack
Mr. Jacobi
David Opatoshu
Dr. Koska
Gisela Fischer
Farmer
Mort Mills
Farmer's Wife
Carolyn Conwell
Freddy
Arthur Gould-Porter
Miss Mann
Gloria Govrin
Professor Gutman (uncredited)
Norbert Schiller
Woman Backstage (uncredited)
Leoda Richards
Party Guest (uncredited)
Frank Baker
Man in Hotel Lobby with Baby (uncredited)
Alfred Hitchcock
British Correspondent (uncredited)
William Glover
Idealistic Young Man (uncredited)
Mischa Hausserman
Magda (uncredited)
Britt Semand
Post Office Patron (uncredited)
William Yetter Sr.
Stewardess (uncredited)
Kaaren Verne
Swedish Immigration Officer (uncredited)
Paul Sorensen
Airline Official (uncredited)
Hedley Mattingly
VOPO Officer at Roadblock (uncredited)
Curt Lowens
East German Interpreter (uncredited)
Horst Ebersberg
Clerk (uncredited)
Dick Cherney
Blonde Twin in Bus (uncredited)
Wilhelm von Homburg
Herr Albert (uncredited)
Albert Szabo
Prof. Winkelmann (uncredited)
Robert Boon