Not only were their major plot points left unfinished, but in classic cliffhanger style, a whole new one opened up at the end. Through the season we mostly found out who and what caused the blackout, but not why everyone flash-forwarded. We never found out the end goal of the men behind the blackout.


For the technique of beginning and ending with one story while telling different stories in the middle, I would refer to the outer story as a "framing device", or "frame story". The collective work as a whole could be called a "nested narrative", or "story within a story". It sounds like you have 2 stories in your example: one telling the events leading up ...

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