The Twilight Zone is an American media franchise based on the anthology television series created by Rod Serling. The episodes are in various genres, including fantasy, science fiction, absurdism, dystopian fiction, suspense, horror, supernatural drama, black comedy, and psychological thriller, often concluding with a macabre or unexpected twist, and usually with a moral. A popular and critical success, it introduced many Americans to common science fiction and fantasy tropes. The first series, shot entirely in black and white, ran on CBS for five seasons from 1959 to 1964.

The Twilight Zone followed in the tradition of earlier television shows such as Tales of Tomorrow (1951–53) and Science Fiction Theatre (1955–57); radio programs such as The Weird Circle (1943–45), Dimension X (1950–51) and X Minus One (1955–58); and the radio work of one of Serling's inspirations, Norman Corwin. The success of the series led to a feature film (1983), a TV film (1994), a radio series (2002–12), various literature, theme park attractions and various other spin-offs that spanned five decades, including three revival television series. The second series (1985–89) ran on CBS and in syndication in the 1980s, while the third series ran on UPN (2002–03). The fourth Twilight Zone series, helmed by Jordan Peele, was released on CBS All Access from 2019–20.

TV Guide ranked the original TV series #5 in their 2013 list of the 60 greatest shows of all time and #4 in their list of the 60 greatest dramas.