Actress Anne Gwynne claimed because the script wasn't completed by the time production began, much of the dialogue is ad-libbed.
Filming began October 6, 1941, and release took place on April 17, 1942. Patric Knowles finished this film before starting "The Wolf Man" on October 27, both films copyrighted 1941.
Part of the original SHOCK THEATER package of 52 Universal titles released to television in 1957, followed one year later with SON OF SHOCK, which added 21 more features.