This game follows what's called an Episodic format. The reference to "Episodes" refers to the style of storytelling in a television show. As in a TV show, each Episode is considered to be a major event or story in the participating characters' lives. Episodes do not include all the details of a character's life, and are not necessarily told in a strictly chronological fashion.
Episodes are comprised of a series of Scenes, which represent the individual interactions within the greater Episode.
Characters are considered to be active when not in Episodes, and that period of time is called Downtime.