Season 4, Episode 16
“You remember you said all of this would stop being strange?”
“You remember you said all of this would stop being strange?”
Apparently this is just a week for purposeful repetition in television, with both Community and 30 Rock doing episodes that used callbacks to previous episodes in order to tell their stories, and now Fringe doing the same. There's a reason that I cited two comedies for this example, as it's the form which most often uses this trope, and does so the most effectively. (One of my favorites was a fifth season Scrubs episode, which essentially just re-filmed all of the show's best bits from the previous four seasons and made it into an episode.) With dramas, such a move is a bit trickier, as it usually requires to take on some sort of thematic relevance, or barring that, at least have a specific purpose as it relates to the overall narrative.