Series
A series comprises a potentially unlimited number of episodes, each being a self-contained plot which can be screened in any order. Documentaries in more than one part can also be series.
There are also so-called limited series. According to the Canadian Television Fund, limited series is generally defined asbeing six episodes or less and will always handle a subject matter in its entirety and in a manner which results in a conclusion. As such, the intention is that the limited series will not be renewed. Multiple episode productions that do not meet these criteria will be considered a series for the purposes of the CTF’s evaluation.
SOURCES:
http://www.afc.gov.au
http://www.canadiantelevisionfund.ca/pages/guidelines/Documentary04-05.pdf