Varys betrays Daenerys by spreading the news that Jon is the real heir to the throne and straight up telling him "Look I don't know if Daenerys is going crazy or not but I know you're sane and would make for a better king" when he reaches Dragonstone. Tyrion tells on him and Daenerys gives him the Tarly treatment.
Tyrion begs Daenerys to stop the siege if she hears bells toll. She apparently agrees.
Jaime has been captured offscreen and is held prisoner, Tyrion goes to free him and tells him to save Cersei by escaping through a secret passage out of the Red Keep, They'll find a boat waiting for them. I think Davos is the one who leaves the boat there as a favor to Tyrion but I have no idea if he knows who will be using it.
Arya and The Hound are inside King's landing. She wants Cersei and he's ready for the Cleganebowl.
The siege begins, Denerys effortlessly solos both the Iron Fleet and the Golden company (who is standing OUTSIDE the walls for some reason) , takes out all the scorpions and destroys the city gates.
The good guys enter the city and all the Lannister soldiers surrender. The bells are tolling, and the fight apparently ends without any civilian dying, the only casualties being the Golden company Mercenaries and a bunch of pirates. But uh oh, Daenerys doesn't like the sound of the bells and goes crazy (no, I'm not making this up) and starts burning down the citiy, roasting most of the population of King's landing before heading to the red keep to burn it. Grey Worm goes "Yass kween slay!" and starts killing Lannister soldiers, followed by the rest of the Unsillied, Dothraki and Northmen. Once they're out of defenseless soldiers to kill they move on to the civilians.
Arya and the Hound are inside the Red keep as it starts crumbling, he tells her to choose life over her revenge and get the fuck out. She does.
Cersei, Quyburn and the Mountain are escaping the Red keep, when they are stopped the Hound. Mountain kills Quyburn by bitchslapping him into oblivion. Gregor and Sandor start fighting as Cersei runs away. The fight ends in a draw and they both die.
Jaime is about to enter the secret passage into the red keep when he stumbles upon Euron who survived the destruction of his fleet and just happened to be there because the plot demanded it. Euron decides to fight Jaime (despite the fact that they met near the escape boat and he could have just taken it and run away) , Jaime wins and kills Euron but is seriously wounded. He enters the keep and reaches Cersei. They talk a bit and die together as the escape tunnel collapses on them.
Daenerys won't fucking stop destrying King's landing and the army retreats before she decides to burn them too. There is a long scene where Arya escapes from king's landing and befriends a horse (yes really).
End of the episode.
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