"Game of Thrones" Season 5, episode 2, "The House of Black and White," pushed several storylines forward and made some noteworthy changes from George R.R. Martin's "A Song of Ice and Fire" series. The new preview for episode 3, "High Sparrow," focuses on the change in leadership within the Night's Watch and teases the return of the Boltons.

Warning: "Game of Thrones" Season 5 spoilers ahead.

"In King's Landing, Queen Margaery (Natalie Dormer) enjoys her new husband. Tyrion and Varys walk the Long Bridge of Volantis," reads the "Game of Thrones" Season 5, episode 3 synopsis. It looks like we'll get our first wedding of the season, but don't expect as lavish or as deadly of an affair as the Red Wedding from Season 3 or the Purple Wedding from last season. Tommen Baratheon will marry Margaery Tyrell -- much to the chagrin of Cersei Lannister. Tyrion's journey with Varys continues as they stop at the capital of the slave trade before they head to Meereen.

The episode 3 preview does not feature any weddings, but we are treated to our first look at the Boltons and Reek/Theon.  The "High Sparrow" clip starts with Vale bannermen possibly headed for battle. Littlefinger wants Sansa to avenge the murder of her family, but it's unlikely he would do that with a battle instead of diplomacy.

Arya made her way to the House of Black and White in episode 2, and she'll learn more about the Faceless Men and begin her training with Jaqen H'ghar in "High Sparrow." The episode's title is another name for the High Septon of the Faith of the Seven. The Sparrows and the Faith are going to cause plenty of problems for Cersei. Further north, newly elected Lord Commander Jon Snow will have to deal with rival factions, and we get a very quick look at the Boltons and Reek.

HBO also released several clips from "The House of Black and White." In the "'Game of Thrones' Season 5: Inside the Episode #2" video, series creators D.B. Weiss and David Benioff discuss Dorne and Prince Doran's motivations. While Cersei is making all the bad decisions in King's Landing, Daenerys is making the right ones in Meereen. While it may make her unpopular, Daenerys is trying to be a fair and just ruler.

In another clip, Martin discusses the Night's Watch election.

Dorne is the subject of two behind-the-scenes videos released by HBO. The first focuses on the threat posed by Cersei's and Jaime's decision to head to Dorne. The next clip is a featurette exploring the region and bringing it to life on "Game of Thrones." We also learn a bit more about Myrcella Baratheon, Trystane Martell, Prince Doran and Areo Hotah.