Interlude: (noun) The portion of the story that gets inserted between doses of ’ludes. Tends to give the other portions some clarity, explore backstory (see "backstory").
Plot: (noun) Where characters are buried when they die.
Backstory: (noun) The stuff only the writer knows about the situation and characters, often inserted into the narrative because he can’t figure out where the story should meander next. (See “Interlude.”)
...to be continued...