S3E9 · The Rains of Castamere

Complete story — includes the ending

Sam, Gilly, and her son arrive at the Wall. While hiding in a tower during a thunderstorm, Bran enters a panicked Hodor's mind to prevent him from accidentally revealing their hiding place to a group of wildlings below, unbeknownst to them, including Jon. Jon is suspected of still being loyal to the Night's Watch when he refuses to murder a farmer, whom Ygritte kills. Bran wargs into Summer to save Jon, who kills Orell before escaping, leaving a furious Ygritte behind with Chief Tormund. Osha, Rickon, and his direwolf, Shaggydog, depart for the Last Hearth to seek shelter from Stark bannermen from House Umber, while Bran, Meera, Jojen, Hodor, and Bran's direwolf, Summer, plan to go beyond the Wall to find the Three-Eyed Raven. With their army having defected, Yunkai agrees to Daenerys's demand to release all of its slaves. Robb arrives at the Twins and apologises to Walder for reneging on his marriage pact. Walder Frey appears to accept his apology while Edmure marries Roslin Frey, Walder's sole pretty granddaughter. After the newlyweds leave the feast, Walder's men suddenly attack their guests, murdering Stark's men, as well as Talisa and Catelyn, while Roose Bolton, who had secretly made a deal with the Lannisters, betrays and kills Robb. Ser Brynden "Blackfish" Tully, Catelyn's uncle, survives, having excused himself from the feast just prior to the slaughter to relieve himself. The Hound and Arya arrive at the Twins during the massacre, but the Hound carries Arya to safety.