Trivia

This film was planned to incorporate three self-contained stories. The third part, based on the short story "If I Should Die Before I Wake", was excised because the first two stories already constituted a feature-length film, and the production company did not feel an audience would be willing to see a film longer than 120 minutes. It was released as the stand-alone feature If I Should Die Before I Wake (1952).

This film was restored by the UCLA Film and Television Archive and presented in 2024 as part of the annual UCLA Film & Television Archive Festival of Preservation. The Golden Globe Foundation and the Film Noir Foundation funded the restoration project. Before the start of the screening at the Hammer Museum's Billy Wilder Theatre, Eddie Muller introduced the film, discussing both its production and its eventual rediscovery and preservation.

This film is an Argentine adaptation of two short stories ("Somebody's on the Phone" and "The Hummingbird Comes Home") by American crime and suspense fiction writer Cornell Woolrich, who is credited under his frequent pen name William Irish. Unlike most omnibus films, it does not feature a frame story.

Premiered on "Noir Alley" on Turner Classic Movies, presented by Eddie Muller on 8 June 2024. Muller stated this was the North American broadcast premier of the film.

Never Open That Door (1952) (Don't Ever Open That Door) was included in the 2022 list of The 100 Greatest Films of Argentine Cinema at number 45, a poll organized by the specialized magazines La vida útil, Taipei and La tierra quema, which was presented at the Mar del Plata International Film Festival.