I remember watching a couple of episodes of Under The Dome and then getting bored of the concept and bailing on it. I forgot about the show for a couple of years and then saw something advertising a third season and I was like "How are they still under that fucking dome?!"
Me with Prison Break. Watched the first season, thought it was pretty good but moved on with my life. Then a few years later saw a trailer for Season 4 or 5 and said "you mfers already escaped from the prison! What are you doing back there??"