Charles William Mumy Jr. is an American actor, writer, and musician and a figure in the science-fiction community/comic book fandom. He came to prominence in the 1960s as a child actor whose work included television appearances on Bewitched, I Dream of Jeannie, The Twilight Zone, Alfred Hitchcock Presents, and a role in the film Dear Brigitte, followed by a three-season role as Will Robinson in the 1960s sci-fi series Lost in Space. Mumy later appeared as lonely teenager Sterling North in the film Rascal (1969) and Teft in the film Bless the Beasts and Children (1971).

The Twilight Zone is an American fantasy science fiction horror anthology television series created and presented by Rod Serling, which ran for five seasons on CBS from October 2, 1959, to June 19, 1964. Each episode presents a standalone story in which characters find themselves dealing with often disturbing or unusual events, an experience described as entering "the Twilight Zone", often with a surprise ending and a moral. Although often considered predominantly science-fiction, the show's paranormal and Kafkaesque events leaned the show much closer to fantasy and horror. The phrase "twilight zone" has entered the vernacular, used to describe surreal experiences.