Episode 3-10
Title: "Mhysa"
Directed by David Nutter
Written by David Benioff & D. B. Weiss
Original Air Date -- June 9, 2013
House Frey receives the Seat of Riverrun, Roose Bolton is appointed the new "Warden of the North", resulting in a victory of House Lannister. Amidst the massacre of the Northern army, Arya and the Hound witness Frey soldiers mocking the desecrated remains of Robb Stark. While coming upon four Frey men discussing the murder, Arya slips off and kills one of the soldiers and is then assisted by the Hound who dispatches the others. Meanwhile Yara Greyjoy begins a new military campaign to recapture Theon who is being held at Dreadfort by Lord Bolton's bastard son Ramsay Snow. In King’s Landing, Tywin chastises Tyrion for not having impregnated Sansa and reiterates the importance of family. Jaime and Brienne finally arrive in the capital, and Jaime immediately goes to see Cersei. In the North, after crossing paths with Bran and guiding him beyond the Wall, Sam arrives back at Castle Black, where he and Maester Aemon send out ravens to alert the whole of Westeros about the arrival of the White Walkers. Ygritte catches up to Jon and tearfully shoots him full of arrows. Jon manages to escape and collapses before the gates of Castle Black, where Sam orders him to be cared for. At Dragonstone, Davos allows Gendry to escape and Stannis receives the distress-call from the Night's Watch. After word from both Melisandre and Davos he now plans to move north and aid the Watch against the invading darkness. And across the Narrow Sea, the freed slaves of Yunkai receive Daenerys as their "mhysa", meaning "mother" in Ghiscari.
Source:
https://en.wikipedia.org/wiki/Game_of_Thrones_(season_3)