In the fourth season, the Hound decides to ransom Arya to her aunt Lysa Arryn of the Eyrie. The pair stop at a tavern on the way, and Arya suggest they attack a set of Lannister soldiers because she recognises one of them as Polliver, the man who stole Needle and killed her friend Lommy. He even has her sword on his belt, so Arya is eager to retrieve it.
When they enter the tavern, Polliver recognises the Hound, and the pair exchange heated words over some chickens and Arya's virtue. A fight ensues, with Clegane killing several men. But when Polliver attempts to attack the Hound from behind, Arya cuts their enemy down and steals back Needle. "Something wrong with your leg, boy?" she asks, repeating the words Polliver spoke before murdering Lommy. She then presses Needle into his throat, killing him in the same way he did her friend. And thus, Polliver becomes the first person marked off her kill list.
Upon exiting the tavern, the Hound trusts Arya enough to allow her the freedom of having her own horse, another signal that they're a team rather than adversaries.