The grove of trees through which Celia (Joan Bennett) runs when she flees the house is the same grove through which the Wolf Man ran in El lobo humano (1941), also made by Universal. In particular, the tree, against which she leans, is the same one under which the Wolf Man was beaten.
Producer and Director Fritz Lang's attempt to do his version of Rebeca, una mujer inolvidable (1940) was a project fraught with disaster. It ran over budget and over schedule, while Lang was at constant loggerheads with his leading lady, Joan Bennett. He also had a rather fraught relationship with cameraman Stanley Cortez. The first preview of the movie attracted comments like "beyond human endurance" and "it stinks". Sir Michael Redgrave said that "even Fritz Lang couldn't make a silk purse out of this particular sow's ear", whilst Joan Bennett referred to the movie as "an unqualified disaster".
This film was a major flop at the box office, losing $1,145,000 ($14.35M in 2023) which resulted in the financial failure of Diana Productions which was co-owned by Joan Bennett, her husband producer Walter Wanger and director Fritz Lang.
In the tour of the three rooms, Mark Lamphere (Sir Michael Redgrave) recounts the tales of three murders, all of which are fictional. However, in the first room, he mentions the St. Bartholomew's Day massacre and the Guise family in France. The massacre is a real historical event, where French Roman Catholics attacked French Huguenots (Protestants) on August 24, 1572, resulting in many deaths. The Guise family was a leading family in the Roman Catholic faction and may have been involved in the instigation of the unrest and other actions which led to the massacre.