The Hound and Arya Reunite
Arya and the Hound don't see each other again until season eight where they meet by the forges in Winterfell. Clegane complains about the quality of the dragonglass axe Gendry makes for him, and Arya comes to her friend's defence. The pair lock eyes, and the Hound gives Ayra a backhanded compliment that simultaneously cheers and jeers her decision to leave him to die: "You're a cold little bitch, aren't you? Guess that's why you're still alive."
The next night the Army of the Undead attacks Winterfell, and Arya finds herself trapped in the castle library surrounded by wights. Beric rallies the Hound to help save Arya, and the three narrowly escape.