The car Lanyard and Jamison drive at the beginning of the film is a 1937 Packard Super 8 convertible coupe.
Warren Hull (Bob Penyon) and William Forrest (Arthur Trent) would be reunited in "The Green Hornet Strikes Again!" later that year.
Although the on-screen 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.