Trivia: Most of the secondary cast and extras were people who actually fled Europe to America during Nazi rule. When Laszlo orders the band to play "La Marseillaise," it was very emotional for the cast who sang along and their reactions were very much their true feelings at the time.
Trivia: Even though Greer Garson plays Richard Ney's mother in the movie, she was only 12 years older than him.
Trivia: Director Alfred Hitchcock has a cameo role in this film - he is seen standing in front of Cut Rate Drugs where Barry Kane is taken upon arrival in New York City.