"The Screen Guild Theater" broadcast a 30 minute radio adaptation of the movie on April 16, 1945 with Sydney Greenstreet, Peter Lorre and Zachary Scott reprising their film roles.
First film of Zachary Scott.
For a scene taking place in the Parisian subway,which was rebuilt and filmed on Warner sound stage,the name of subway station "Balard" is misspelled and written "Ballard".