A television program (USA), television programme (in most Commonwealth countries and Ireland), or television show (USA/UK) is something that people watch on television. It may be a one-off broadcast or part of a periodically recurring television series.

A television series that is intended to be broadcast a finite number of episodes is usually called a miniseries or serial (although the latter term also has other meanings). A short run lasting less than a year is known in North America as a season and in the United Kingdom and the Republic of Ireland as a series. This season or series usually consists of 6–26 installments in the USA, but in the UK there is no defined length. U.S. industry practice tends to favor longer seasons than those of some other countries.

A single instance of a program is called an episode, although particularly in the USA this is sometimes also called a "show" or "program", and in Great Britain and Ireland a "programme". A one-off broadcast may, again particularly in the USA and USA-influenced countries, be called a "special", or particularly in the UK a "special episode". A television movie or in the UK a television film ("made-for-TV" movie) is a film that is initially broadcast on television rather than being released in cinemas or direct-to-video, although many successful television movies are later released on DVD.

Today, advertisements play a role in most television programming, such that each hour of programming can contain up to 15 minutes of advertisements in some countries. By contrast, being publicly funded, the BBC in the United Kingdom does not run advertisements, except to trail its own programmes. Its promotions appear between and near the end of programmes but not in the middle of them, much like the Public Broadcasting Service (PBS) in the United States and the Australian Broadcasting Corporation (ABC) in Australia. The number of commercial interruptions can also vary, for instance Japanese television tends to prefer fewer and longer commercial breaks while American television has several spread throughout the program. This has an impact on the writing of the show; in order to provide a smooth transition as well as keep the audience from switching channels.

The longest TV program ever sent non stop was 24h Berlin in 2009.