Next up: Beric Dondarrion and his flaming freaking sword! We haven’t seen that since season 3. No doubt it can be put to good use against some wights.
Next, Greyjoy ships sail into Blackwater Bay. Is Euron Greyjoy here as a friend or foe to Cersei?
We also see a few flashes of the Unsullied invasion of Castlery Rock, which we glimpsed in the first trailer.
And in the shot below, a few Unsullied open a gate to let others in.
What I’m betting happens here is that Grey Worm and a few other guys sneak into Casterly Rock via a hidden entrance (see that shot of Grey Worm sailing toward a fissure in a cliff face above) and let the rest of the army in.
Back on Dragonstone, Dany is chilling: