Thanks to Bertholdt’s colossal smoldering husk falling off the wall, he and Reiner are able to make off with both Ymir and an incapacitated Eren in a literal cloud of smoke. All the scouts present end up injured and burned in some way, and Mikasa, who is knocked out, isn’t able to immediately give chase, like she did when Annie took Eren. No one is.
It’s a good a time as any, then, for another flashback to the “good old days” when Eren, Mikasa and Armin played out the very same dynamic: Eren would bite off more than he could chew in fights with bullies, Armin would run to Mikasa, and Mikasa would unleash hell on those who hurt Eren. But because she’s almost always just a bit late, she’s rarely able to get Eren out of a fight before he gets beaten up.
Hannes, who remembers this (and misses being a ‘useless drunk soldier’), reassures the two that Eren won’t give up just because he’s been taken away. There’s no evidence of him ever giving up throughout the years they’ve known him. So the best thing for Mikasa and Armin to do is not to stew in their own present helplessness, but rest, heal, and eat food, so they can give their best when it’s time.
That time comes sooner than expected, as Erwin arrives with the military police and join forces with the scouts to go across the wall. Hange believes the two traitors are likely tired after their ordeal and will hole up in the nearby giant forest until nightfall, when (most) other Titans don’t move.
She turns out to be correct, as Eren wakes up, still steaming and missing his arms, beside Ymir, who is looking much better than a couple episodes ago (in that she’s up, about, and talking). Reiner and Bertholdt are both back to their human forms. They should have a lot to talk about before the cavalry appears, and before the sun goes down.