"Game of Thrones" Season 4, episode 8, "The Mountain and the Viper" airs on Sunday but HBO has been relatively quiet on what we can expect from the new episode. Based on the preview and the synopsis, the trial by combat between the Mountain and the Red Viper will happen, the aftermath of Lysa's fall through the Moon Door and the wildling attack on Castle Back will occur in "The Mountain and the Viper" but a new "Mockingbird" recap video reveals some trouble for Jorah.

Warning: Full "Game of Thrones" Season 4 spoilers ahead.

Based on the minimal synopsis for "The Mountain and the Viper," we know of four major storylines. Per HBO, "Mole's Town receives unexpected visitors. Littlefinger's (Aidan Gillen) motives are questioned. Ramsay (Iwan Rhoen) attempts to prove himself to his father. Tyrion's (Peter Dinklage) fate is decided." In new promo photos released by HBO, we can at least expect Arya and the Hound to make an appearance and, from the photos, it looks like they could be at the Vale. 

The new photos for "Game of Thrones" Season 4, episode 8, also include Daenerys and Jorah. While the images do not provide a lot of context, the "Mockingbird" recap video could offer some clues as to what to expect from Sunday's storyline. In the "'Game of Thrones' Season 4: Episode 7 Recap" video, scenes from Season 1 involving Ned Stark and Lord Varys were included. In the scene, Lord Varys talks about Jorah serving as an advisor to Daenerys and his role, which included sending reports back to King's Landing, was mentioned in episode six, "The Laws of Gods and Men." Daenerys may have finally found out about Jorah's betrayal and his fate could be decided in "The Mountain and the Viper."  

In an interview with Alex Graves, the director discusses the trial by combat and the fight scene between the Mountain, Ser Gregor Clegane, and the Red Viper, Oberyn Martell. According to Graves, "That scene is two people skimming the surface of one of the single most important events in the mythology of the show, and it is the night of the murder of Elia Martell." In addition to the trial by combat to decide Tyrion's fate, Graves mentions the "Trial of Littlefinger," following the death of Lysa in "Mockingbird," as another scene to pay attention to in Sunday's episode.

"Game of Thrones" Season 4, episode 8, "The Mountain and the Viper," airs on Sunday at 9 p.m. EDT on HBO. The "Mockingbird" recap video can be viewed below.