I've been rewatching older shows a lot lately and I'm constantly surprised by the storylines I've forgotten over the last couple decades.

Like in Chicago Fire when one of the main characters lost his fiancee in a fire, went undercover in a human trafficking/drug ring, became an alderman, nearly died in a fire multiple times in the span of like the first three seasons.

I don't even want to wonder what I've forgotten in Grey's Anatomy over the last 19 years