The car Lanyard and Jamison drive at the beginning of the film is a 1937 Packard Super 8 convertible coupe.
Although the onscreen credits specify the movie was based on a story by novelist Louis Joseph Vance, no such story has been found. Vance did however create the Lone Wolf character and wrote eight novels about him.
Warren Hull (Bob Penyon) and William Forrest (Arthur Trent) will be reunited in The Green Hornet Strikes Again, later that year.