Door into Darkness (Italian: La porta sul buio) is an Italian anthology horror television series conceived by Dario Argento.
Unbeknownst to the couple, the neighbor upstairs has a terrible secret A mystery begins with the discovery of a dead woman's body in the titular location and a detective's thought process on how she got there After a patient of an insane asylum escapes and goes on a killing spree, the police and psychiatrists attempt to work together to apprehend the killer.
Roberta drives home and nearly hits a woman with her car.
When checking the woman, she finds a bullet wound in her chest and sees a man approaching her with a gun.
In a retrospective review, Troy Howarth in his book on gialli stated that "The Neighbor" was a "pleasant diversion" and "The Tram" was the series highlight.