As I mentioned in another comment, it just binged through a show called line of duty, and the ones they did were very, very good, especially as the seasons went on. In season six, they started by recapping certain elements from season one, and did that clever “wink“ to hinted what might soon be to come. It didn’t spoil anything, because the “thing“ happened pretty early on in the first episode. Each episode after that showed them again, but progressing through a bit more into each season before it addressed what happened in the previous episode.

Everything that happens in every season finally culminates in season six, so they put it together pretty well.