With HBO's popular historical fiction drama "Game of Thrones" set to return this coming Sunday, fans are eager to know what will happen in the upcoming forth season. For spoilers from the shows cast, read on.

Mark Stanley, who plays the role of Grenn on "Game of Thrones" recently spoke to TV Guide in an interview. He discussed what is in store for Jon Snow and the Night's Watchmen in the fourth season.

"Jon has got a lot of responsibility to take. You'll really see a unity among the Night's Watchmen led by Jon Snow, and you'll see us all come together," he said. 

The actress who plays Sansa Stark, Sophie Turner, also revealed some spoilers when speaking with TV Guide. She spoke about what fans can expect from her character in the fourth season.

"Her mother and brother have died, as we know, and she's just feeling very trapped in the marriage, trapped in King's Landing, and it's a sad time for her," the actress said.

Turner went on to explain how Sansa will overcome her sadness. It seems the upcoming season will see a transformation of sorts for the character.

"She goes from very much being a victim and a pawn in other people's games to manipulating the people who've gone before her. She kind of becomes a dark horse. She's survived, but now it's time for her to start living," Turner said.

The fourth season of "Game of Thrones" airs this Sunday on HBO at 9/8c.