is a 1974[3] supernatural horror film directed by Ovidio G. Assonitis and Roberto Piazzoli, and starring Juliet Mills, Gabriele Lavia, and Richard Johnson.

That film's distributor, Warner Bros., filed a lawsuit against the production company behind Beyond the Door, claiming copyright infringement.

Jessica Barrett, a young English mother living in San Francisco, reveals to her music executive husband, Robert, that she is pregnant.

After visiting Dr. George Staton, her obstetrician and personal friend, Jessica is informed that she is in fact three months pregnant, not the mere weeks she believed.

Over the course of her pregnancy, Jessica finds herself subject to violent mood swings, apparent hallucinations of voices, and poltergeist phenomena.

Meanwhile, Jessica exhibits increasingly horrifying behavior akin to demonic possession, such as inhumanly twisting her head, wheezing and projectile vomiting.

Robert is contacted by a mysterious man named Dimitri who instructs him to sequester Jessica in their house and keep visitors away, assuring that the child is born.

In a violent confrontation between Jessica and Dimitri, the demonic entity turns on him, and implies that all of the events that have taken place were arranged for its own amusement.

Ken unwraps a gift he earlier acquired on his birthday, concealed in black wrapping paper with a gold ribbon.

[1] A number of collaborating writers also assisted, including Alex Rebar, Giorgio Marini, Aldo Crudo, and Christopher Cruise.

[1] Warner Bros. filed a lawsuit in August 1975 seeking an injunction and $2 million in damages, claiming it unfairly competed with The Exorcist and for copyright infringement.

[8] Bill DeIsle of The Times-Record also compared the film unfavorably to The Exorcist, panning the script and also noting the special effects as juvenile and laughable.

[9] Linda Gross of the Los Angeles Times drew similar comparisons, also noting the film's score as "obtrusive", but conceded that Mills plays her role "with credibility".

"[12] Reviewing the film for Little White Lies, Anton Bitel remarked "Beyond the Door is too odd, too indefinable, too singular, to be dismissed as merely derivative.

The 2-disc DVD set was released on 16 September 2008 and featured both the international cut (running 109 minutes) and the abridged U.S. theatrical cut (running 97 minutes);[14] it also features interviews with Assonitis, Johnson, writer Alex Rebar, and Mills, as well as commentaries with Assonitis and Mills.

Although only retitled in the U.S., all modern Blu-ray carry the title Beyond the Door III on the prints, including the Region 1 DVD by Shriek Show.