"The Door to Darkness" is an anthology miniseries of four hour-long thrillers. The series' curator and producer is Dario Argento, the undisputed master of suspense cinema, who directs one of the four films under the pseudonym Sirio Bernadotte.
Following the success of his first three films, Dario Argento curated and produced a series of four medium-length films, each approximately an hour long, for RAI. In addition to presenting each episode, the director himself directed one of them, The Streetcar, also taking over from Roberto Pariante as director of Eyewitness. The other two films were directed by Luigi Cozzi, a collaborator of Argento's, and Mario Foglietti.