Episode 4-8
Title: "The Mountain and the Viper"
Directed by Alex Graves
Written by David Benioff & D. B. Weiss
Original Air Date -- June 1, 2014
The wildlings arrive in Mole's Town and massacre the entire village. Gilly is discovered by Ygritte, who spares her once she notices the infant she is holding. Sam laments his decision to leave Gilly there, as he believes her dead. Ramsay forces Reek to masquerade as his former self, Theon Greyjoy, and orders him to get the Ironborn to surrender Moat Cailin. The Ironborn surrender in hopes of returning home but are flayed and slaughtered by Ramsay and his army. As a reward for securing the Moat, Roose legitimizes Ramsay as they arrive at Winterfell. Across the Narrow Sea, Missandei and Grey Worm deal with the sexual tension between the two of them. Ser Barristan receives a letter intended for Ser Jorah, which pardons Jorah as a reward for spying on Daenerys. After Barristan confronts Jorah, he gives the letter to Daenerys, who orders Jorah to leave Meereen and never return. In the Vale, Sansa reveals to a council investigating Lysa's death her true identity and convinces the council of Littlefinger's innocence. Outside the gate of the Vale, the Hound and Arya arrive and are informed of Lysa's death. Meanwhile in King's Landing, Jaime and Tyrion have a philosophical conversation as the trial by combat approaches. During the trial, the Mountain kills Prince Oberyn and confesses his crimes. Tywin sentences Tyrion to death for regicide.
Source:
https://en.wikipedia.org/wiki/Game_of_Thrones_(season_4)