Door into Darkness (Italian: La porta sul buio) is an Italian anthology horror television series conceived by Dario Argento. It consists of four one-hour episodes broadcast in 1973.

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. Howarth declared "The Doll" as "sluggish and predictable" while "Eyewitness" a "marked improvement" from "The Doll".