A television program is a segment of content intended for broadcast on television, other than a commercial, channel ident, trailer, or any other segment of content not serving as attraction for viewership. It may be a single production, or more commonly, a series of related productions (also called a television series). A television series that is intended to comprise a limited number of episodes may be called a miniseries or serial. Series without a fixed length are usually divided into seasons or series, yearly or semiannual sets of new episodes. A one-time broadcast may be called a "special," or particularly in the UK a "special episode." A television film ("made-for-TV movie" or "television movie"), is a film that is initially broadcast on television rather than released in theaters or direct-to-video. A program can be either recorded, as on video tape, other various electronic media forms, played with an on-demand player or viewed on live television. Television programs may be fictional (as in comedies and dramas), or non-fictional (as in documentary, news, and reality television). It may be topical (as in the case of a local newscast and some made-for-television movies), or historical (as in the case of many documentaries and fictional series). They could be primarily instructional or educational, or entertaining as is the case in situation comedy and game shows.