HBO’s Game of Thrones is a dense series with a huge weight of history behind its story. So in practically every episode, something happens that could use a little explanation. Every week, The Verge will dive into a scene or event from the latest episode of the series and explain how we got here. Whether you’re basically a Game of Thrones maester or you need a little reminder about previous events, we’ll try to help you keep your history straight.

Oh boy. Game of Thrones’ longest episode ever, “The Long Night,” features a spectacle that was billed as a battle unlike any other ever seen on television. (Depending on your TV setup, it may literally have gone unseen — seriously, this was a darkly lit hour and a half, which sparked an endless wave of online complaints from viewers struggling to figure out what was going on.) It was a frantic episode of TV that mostly focused on the play-by-play of the war against the undead. So instead of our usual weekly lore breakdown, this week we’ll be looking at some of the smaller moments seeded throughout the show’s past that finally paid off here.

Spoilers ahead for Game of Thrones season 8, episode 3, “The Long Night”

Brown eyes, blue eyes, green eyes

Okay, so lets start with this episode’s big event here: Arya kills the Night King. But while she seemed to pop up out of nowhere to stab the dreaded leader of the White Walkers, her role in this story has been seeded for years, with her Faceless Man training and the foreshadowing of her Valyrian steel dagger giving her all the tools she needed.

But as the episode reminds us, the foreshadowing for the big kill goes back even further — all the way back to season 3, episode 6, when Melisandre first meets Arya and issues a prophecy: “I see a darkness in you. And in that darkness, eyes staring back at me: brown eyes, blue eyes, green eyes. Eyes you’ll shut forever. We will meet again.”

As it would happen, the reunion she promised came at the Battle of Winterfell. And the blue eyes Arya would shut forever were the Night King’s, along with every other wight and White Walker, all of whom stemmed from him.

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