This is a list of television programs that were later adapted into feature films.

Programs with films which are prequels, sequels or based upon the series

Pilot episodes released as feature films

Television pilots that were soon or later adapted into feature films for either a release or re-release to movie theaters or direct-to-video. Many other series have released pilots or edited multi-part episodes as films overseas, including The Greatest American Hero and The X-Files.

Failed pilots

Some feature films began as a pilot for a TV series that was not picked up by any networks; most of these many failed pilots have been aired as television films.

Television films

The following are television films that never saw theatrical release.

Pilots

Some television films have functioned as pilots or backdoor pilots for a subsequent TV series, but most of them start off as the first regular episode of a series overall.

Before main run of show

First episode proper

Reunion films

Many American TV series have had TV films, usually filmed five or more years after the run of the original series, which reunite the cast of the series for a new plot. In some cases, there has been an entire string of such films, including for the detective shows Perry Mason (1957–1966; 30 films from 1985 to 1995), The Rockford Files, (1974–80; eight films from 1994 to 1999), and Hart to Hart (1979–1984; eight films from 1993 to 1996). In at least one case, with the 1988 Get Smart reunion film Get Smart, Again!, the success of the TV film eventually led to a brief 1995 revival of the series. There have also been many television reunion specials, in which some or all of the original cast is brought together for interviews and clips.

Specials

Television series that have had standalone episodes as films, from continuations and resolutions of storylines through expanded installments with similar miscellaneous purposes, and specials based on their respective characters and elements for alternative reasons of otherwise; most of these episodes aired first as feature-length installments, approximately one or two hours in length, before being later cut into separate multi-part episodes for reruns.

Episodes as films

Standalone specials

Programs re-edited for release as feature-length films

One or more episodes from the following television programs were edited together for release as a feature film. Some of the films add new material, and others do not.

Episodes released theatrically

Films re-edited as episodes for a television program

Highest-grossing films based on television series