Moyna MacGill (the mother of Angela Lansbury) has an uncredited role as the customer who enters the cigar shop while Roderick is speaking with the proprietor.
When Stella enters a trance and speaks in Spanish during the seance, she says, "Listen, listen! It's not her! It's not her! Do not believe anything! Do not listen to her, because she's lying! You thief! Thief of my love!"
Paramount added special effects to the film, having decided at the last moment to emphasize its supernatural premise. The effects were removed by censors when the film was distributed in England.
Paramount contract player Elizabeth Russell posed for the painting of Mary Meredith. She and actress Lynda Grey, who played the ghost, closely resembled each other. At the time the painting was created, Grey wasn't available to pose.
The song "Stella By Starlight" was written specifically for this movie and is featured several times. In the movie Roderick Fitzgerald writes it for Stella Meredith.