George R.R. Martin
Author and co-executive producer George R.R. Martin arrives for the premiere of the fourth season of HBO series "Game of Thrones" in New York March 18, 2014. REUTERS/Lucas Jackson Reuters

"Game of Thrones" Season 4, Episode 4, titled "Oathkeeper," airs on HBO this Sunday, Apr. 27. In this week's new episode, Cersei Lannister throws Jaime Lannister a pseudo hypothetical: Will Jaime kill Sansa Stark for her? The Queen Regent (again) asks. GOT fans must watch S4xE4. Another "shocking death" could unfold.

Spoiler alert: This feature contains spoilers on Game of Thrones Season 4. Episode 4 ("Oathkeeper") could feature another major character's death, based on the events in George R.R. Martin's book series, "A Song of Ice and Fire."

In the Game of Thrones Season 4, Episode 4 promo video, Cersei (Lena Headey) compels Jaime (Nikolaj Coster-Waldau) to find and kill Sansa Stark (Sophie Turner). Viewers look forward to seeing how Brienne of Tarth (Gwendoline Christie) will participate in this "Sansa mission."

Sansa is currently in the custody of the cunning Petyr Baelish aka Littlefinger (Aidan Gillen). Speaking to VH1.com, Gillen said Littlefinger is looking at Sansa as a potential "partner in crime." In the same interview, Gillen hinted his role in the death of King Joffrey in Game of Thrones Season 4, Episode 2.

Will Jaime kill Sansa Stark despite Brienne's allegiance to the late Catelyn Stark (Michelle Fairley)? In Martin's book series, Jaime lends Brienne the Valyrian sword made of Stark steel, the "Oathkeeper." He asks her to find Sansa and honour the pledge he made to Sansa's mother, Catelyn.

Also in the books, Jaime does not kill Tyrion as Cersei begged him to do. Instead, Jaime turns to Varys aka the Spider, when the trial fails to free Tyrion. Shortly after this, Tyrion kills Tywin Lannister. These things could be seen in Game of Thrones Season 4, Episode 4, but perhaps with some tweaks. (GOT fans are still reeling from the "rape" scene a week ago.)

In the book, Oberyn Martell sees Tyrion's trial as an opportunity to advance his personal vendetta. Peter Dinklage as Tyrion Lannister could have some stellar moments again in GOT 4x4. Meanwhile, Tyrion's faithful lad, Podrick Payne aka Pod (Daniel Portman) is about to cross paths with Brienne.

WATCH: Game of Thrones Season 4, Episode 4 ('Oathkeeper') | HBO on YouTube Videos

Here are some of the must-see developments in GOT 4. To comment on or discuss the YouTube video below, follow this link.

Game of Thrones Season 4 airs Sundays on HBO. The next new episode, "First of His Name," airs on May 4.

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