A television program also called television show, is a segment of content which is intended to be broadcast on television

Television

Television is a telecommunication medium for transmitting and receiving moving images that can be monochrome or colored, with accompanying sound...

. It may be a one-time production or part of a periodically recurring series. A single program in a series is called an episode

Episode

An episode is a part of a dramatic work such as a serial television or radio program. An episode is a part of a sequence of a body of work, akin to a chapter of a book. The term sometimes applies to works based on other forms of mass media as well, as in Star Wars...

.

A television series that is intended to comprise a limited number of episodes is usually called a miniseries

Miniseries

A miniseries , in a serial storytelling medium, is a television show production which tells a story in a limited number of episodes. The exact number is open to interpretation; however, they are usually limited to fewer than a whole season. The term "miniseries" is generally a North American term...

 or serial

Serial (radio and television)

Serials are series of television programs and radio programs that rely on a continuing plot that unfolds in a sequential episode by episode fashion. Serials typically follow main story arcs that span entire television seasons or even the full run of the series, which distinguishes them from...

. Series without a fixed length are usually divided into seasons or series, yearly or biannual installments of new episodes.