This week's episode of Game of Thrones promises to really shake things up a bit as season 5 approaches its midpoint.

The official synopsis of episode 4 titled, Sons of the Harpy, reads: "The Faith Militant grow increasingly aggressive. Jaime and Bronn head south. Ellaria and the Sand Snakes vow vengeance."

According to a Franchise Herald report, this week's episode will feature Oberyn's daughters - The Sand Snakes - plotting the murder of Myrcella (Cersei's daughter) to avenge their father's brutal killing. It remains to be seen if Jaime and Bronn are able to rescue her.

Trailer for the upcoming episode shows the Sons of the Harpy launch their rebellion against Daenerys in Mereen. The group is comprised of people who detest her sovereignty and her decision to abolish slavery in a land where slavery is one of the cornerstones of economy. Several scenes also indicate that Daenerys will continue to struggle as she tries to maintain order in her new land.

Meanwhile, fans are eagerly waiting to see what's in store for Sansa Stark who's all set to marry the sadistic Ramsay Bolton as part of Littlefinger's plan to avenge Catelyn and Robb Stark's murder.

Several fan-theories on Sansa's story arc in season 5 have been circulating the web. The most popular one teases the Rat Cook storyline from the books which, in a nutshell, means that Ramsay Bolton could end up as dinner for his own father.

Game of Thrones season 5: Sansa's cannibalistic revenge plot revealed?

According to a report by Film School Rejects;

  • There will be a wedding at Winterfell this season.
  • "Something horrible" is going to happen and it involves at least Sansa, Ramsay and Theon.
  • The reason why Sansa has agreed to this plan is that Littlefinger has offered her a shot at vengeance.

Here are a few alternative theories for what may happen with Sansa and Ramsay's "Grey Wedding", or more specifically this "horrible event" that the cast appears to be promising:

Reek/Theon tries to warn Sansa about the fact that Ramsay is a monster, is caught by Ramsay and is tortured in a very public way as a show of Ramsay's strength.

Brienne and Pod (still following Sansa and Littlefinger) sneak into Winterfell in an attempt to rescue Sansa. They break up the wedding and Brienne kills Ramsay.

Game of Thrones season 5, episode 4 titled, Sons of the Harpy airs this Sunday, 3 May on HBO at 9pm.

Click here to watch the episode via live stream online.