>A limited number of episodes of a television show may be called a miniseries or a serial or limited series. Television series are without a fixed length and are usually divided into seasons (U.S. and Canada) or series (UK), yearly or semiannual sets of new episodes. While there is no defined length, U.S. industry practice has traditionally favored longer television seasons than those of other countries.

https://en.wikipedia.org/wiki/Television_program