Game of Thrones season 4 episode 8 will be airing this Sunday, June 1, after a brief break during Memorial Day weekend last week.

The official synopsis for this week's episode entitled "The Mountain and the Viper" is as follows: "Mole's Town receives unexpected visitors. Littlefinger's motives are questioned. Ramsay attempts to prove himself to his father. Tyrion's fate is decided."

After being accused of killing King Jeoffery, Tyrion's fate will be decided in this week's "trial of combat" challenge.

Who will be coming to Tyrion's defense? It will be Oberyn Martell, who also seeks revenge against Tyrion's father Tywin and sister Cersei. There will be a duel between Gregor Clegane and Oberyn Martell in this week's episode, which is set to be a climax for Tyrion's trial.

Actor Pedro Pascal, who plays Oberyn, recently said the upcoming episode was one of the "challenging things I've ever done."

In a Q&A session in Reddit, the actor also expressed that Tyrion would make a great ruler. "I think the most capable rule of Westeros would be Tyrion Lannister," he said. "Tyrion is very cunning - smarter than everyone in the room."

Game of Thrones Season 4, episode 7 "The Mountain and the Viper," will be airing Sunday, June 1, at 9 p.m. ET on HBO, or alternatively can be watched online through live stream with HBO Go and HBO Connect.

Watch a promo video for Game of Thrones season 4 episode 8 below: