Television pilots within a series.

This category includes pilot episodes that were not broadcast as the series premiere.

It also includes backdoor pilots, i.e. films or miniseries that serve as a proof of concept for a full series, but may be broadcast on their own even if the full series is not picked up. The term may also be used for an episode of a currently running show that serves to introduce a spin-off. Such backdoor pilots commonly focus on an existing character or characters from the parent series who are to be given their own show.