Carol Serling, who helped extend the legacy of her husband, Rod Serling, the television writer best known for creating “The Twilight Zone,” through publishing, academic and screen ventures, died on Jan. 9 at her home in Pacific Palisades, Calif. She was 90.

Her daughter Anne Serling confirmed the death.

Mr. Serling, who died in 1975 at age 50, made a mark in various television projects through the years. But Ms. Serling’s work focused largely on “The Twilight Zone,” the seminal horror, science fiction and fantasy anthology series that ran from 1959 to 1964. Mr. Serling wrote 92 of its episodes, many bearing the imprint of his socially conscious ideas. As the host, he invited viewers into “a dimension not only of sight and sound but of mind.”

For Ms. Serling, “The Twilight Zone” never ended.

She was the associate publisher and consulting editor of Rod Serling’s The Twilight Zone, a monthly magazine, in the 1980s. She was a consultant to “Twilight Zone: The Movie” (1983), a segmented film adaptation whose four directors included Steven Spielberg. In one segment she had a cameo role as an airline passenger in a remake of “Nightmare at 20,000 Feet,” the 1963 episode in which a terrified fellow passenger believes he has spied a gremlin cavorting on the wing outside his window.

In 1994, Ms. Serling found two unproduced stories by her husband in a trunk at her home and sold them to CBS, which televised them as “Twilight Zone: Rod Serling’s Lost Classics.” In 2009 and 2010, she edited anthologies of stories inspired by the series.