A single program in a series is called an episode.

Grade called it the worst episode he had ever seen of anything.

I never know when I'm having what the doctors call an episode.

A single instance of a web series program is called an episode or webisode.

It has been called "the most riveting episode in the sport's history".

The report called his death an "appalling episode of serious gratuitous violence".

After severe symptoms (called a psychotic episode), your loved one may come to you for help.

The interview has been called "the episode that toppled an Egyptian cabinet".

Well, 7sisters, I suppose we could call it the latest episode in a long-running cereal.

He called "Lotto" the best episode of the season.