"Screen Director's Playhouse" broadcast a 60 minute radio adaptation of the movie on May 24, 1951 with Charles Boyer reprising his film role.
"The Screen Guild Theater" broadcast a 30 minute radio adaptation of the movie on June 21, 1943 with Charles Boyer reprising his film role.
Alfred Hitchcock was considered for directing this film.
Two of Barney Oldfield's racing cars was in the Vanderbilt Cup sequence: a 1909 six-cylinder Stearns, and a 1912 four-cylinder, sixteen-valve Prince Henry Benz.