Loved the episode, and had 2 favorite scenes:
1) The Arya & Brienne fight. I rewatched that fight 6 or 7 times, and think I noticed something interesting. After Brienne kicks Arya to the ground (which is a relative shock to the viewer), her face appears concerned, which one might think she's concerned that she took things too far and hurt Arya. But if you rewind the fight, the move or two before that kick was Arya mock slashing Brienne's right leg. Had it been a real fight, that slash would have prevented Brienne from kicking Arya, and I think Brienne realized that she was technically check-mated even if she did the kick. Overall I just loved the whole fight sequence and Brienne's loving interest turned competitive, and then ultimately concerned.
2) There's a brief scene where the Dothraki jump on top of their horses to fire arrows at the shielded line of men. This scene brought to life a moment that never (but almost) actually happened in real human history. It was theorized that the Mongol empire could have potentially conquered Europe, and there's been a lot of intrigue around how European armor and tactics would have held up against mounted cavalry, with most historians thinking the Mongols would win. The GoT clash reminded me so much of this, although the Dothraki did things a bit different (real Mongols typically stood up on their rotating stirrups, and instead of hitting the line of foot soldiers would continually swoop in & out while accurately firing off their armor piercing arrows).