Recurring character

A recurring character or supporting character is a fictional character, usually in a prime time TV series, who frequently appears from time to time during the series' run. Recurring characters often play major roles in more than one episode, sometimes being the main focus. They may be contrasted with "regular" characters, who typically appear in every or almost every episode of a series. Recurring characters appear less frequently than regulars, but more frequently than guest star characters, who may appear in only one or two episodes without being expected to return.