The scene of a foggy forest behind the opening credits is the same as that used in the opening of The Wolf Man (1941).
At the end of the movie, the miniature of the burning mansion is identical to the miniature of the burning castle shown at the climax of The Ghost of Frankenstein (1942).
Alfred Hitchcock attended a screening of this film because he wanted to cast Janet Shaw in his Universal production Shadow of a Doubt (1943), thoroughly enjoyed it, and was amazed at how quickly it was shot, from July 5-18,1942, to be released October 23 on a double bill with The Mummy's Tomb (1942)
While not an actual remake, the film somewhat follows the plot of the 1932 Warner Bros. classic "Doctor X," with nearly the same reveal at the climax. Further, in both films Lionel Atwill plays a doctor.
Part of the original Shock Theater package of 52 Universal titles released to television in 1957, followed a year later with Son of Shock, which added 20 more features.