Episode 4 of "Game Of Thrones" is going to be a big one.

The episode, titled "And Now His Watch Is Ended," will see the first truly epic moment of the show's third season. Fans of George R.R. Martin's book franchise, on which the HBO series is based, might know what's coming in, but here's what showrunners Dan Weiss and David Benioff told reporters during a conference call before the Season 3 premiere.

"We always knew it was going to be one of the big ones," Weiss said (via The Hollywood Reporter). "That was one of the scenes I remember reading it for the first time in the books and being so swept away by it. I remember thinking [that] if we could ever get this to series and we could ever get to season three, we'd actually be able to put that scene on screen."

Here's how HBO describes "And Now His Watch Is Ended," the fourth episode of "Game Of Thrones" Season 3:

The Night’s Watch takes stock. Varys meets his better. Arya is taken to the commander of the Brotherhood. Daenerys exchanges a chain for a whip.

As for Joffrey and Margaery Tyrell, played by Natalie Dormer, the actress recently told TV Guide, "The Tyrells have come and arrived at King's Landing, underestimating the situation. They think that they can control the Lannisters and can take them on. They're going to get a nasty shock." But, she added, Margaery still shouldn't be discounted." Margaery is not safe," Dormer told TV Guide. "She's trying to work out what makes Joffrey tick because if she can work out what makes Joffrey tick, she can control him. And not just control him in a nasty, manipulative way, but control him for the better of the kingdom."

The first five photos from the slideshow below are from "Game Of Thrones" Episode 4 of Season 3. Plus, check out HBO's preview below:

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  • Daenerys Targaryen

  • Sansa Starks And Tyrion Lannister

  • Jaime Lannister and Cersei Lannister

  • Jon Snow

  • Arya Stark

  • Joffrey Baratheon

  • Margaery Tyrell

  • Daario Naharis

  • Ygritte And Tormund

  • Daenerys Targaryen

    Emilia Clarke as Daenerys Targaryen.

  • Tyrion Lannister

    Peter Dinklage as Lannister

  • Rodrik Cassel

    Ron Donachie as Rodrik Cassel.

  • Jaime Lannister

    Nikolaj Coster Waldau as Jaime Lannister.

  • 'Game of Thrones' Character Posters

    Maisie Williams as Arya Stark.

  • Melisandre

    Carice van Houten as Melisandre.

  • Commander Mormont

    James Cosmo as Commander Mormont.

  • Varys

    Conleth Hill as Varys.

  • Jaqen H'Ghar

    Tom Wlaschiha as Jaqen H'Ghar.

  • Gendry

    Joe Dempsie as Gendry.

  • Arya Stark

    Maisie Williams as Arya Stark.

  • Cersei Lannister

    Lena Headey as Cersei Lannister.

  • Samwell Tarly

    John Bradley as Samwell Tarly.

  • Myrcella Baratheon

    Aimee Richardson as Myrcella Baratheon.

  • Davos Seaworth

    Liam Cunningham as Davos Seaworth.

  • Grand Maester Pycelle

    Julian Glover as Grand Maester Pycelle.

  • Shae

    Sibel Kekilli as Shae.

  • Xaro Xhoan Daxos

    Nonso Anozie as Xaro Xhoan Daxos.

  • Bronn

    Jerome Flynn as Bronn.

  • Margaery Tyrell

    Natalie Dormer as Margaery Tyrell.

  • Tyrion Lannister

    Emmy winner Peter Dinklage.

  • Theon Greyjoy

    Alfie Allen as Theon Greyjoy.

  • Robb Stark

    Richard Madden as Robb Stark.

  • Tywin Lannister

  • Sansa Stark

    Sophie Turner as Sansa Stark.

  • Jon Snow

    Kit Harington as Jon Snow.

  • Mellisandre and Stannis Baratheon

    Carice van Houten and Stephen Dillane as Mellisandre and Stannis Baratheon.

  • Oberyn Martell

  • Davos Seaworth

    Liam Cunningham as Davos Seaworth.

  • Joffrey Baratheon

    Jack Gleeson as Joffrey Baratheon.

  • Daenerys Targaryen

    Emilia Clarke as Daenerys Targaryen.

  • Danereys Targaryen

    Emilia Clarke as Danereys Targaryen.

  • Catelyn Stark

    Michelle Fairley as Catelyn Stark.

  • Cersei Lannister

    Lena Headey as Cersei Lannister.

  • Brienne

    Gwendoline Christie as Brienne.

  • Balon Greyjoy

    Patrick Malahide as Balon Greyjoy.

  • Bran Stark and Hodor

    Issac Hempstead-Wright and Kristian Nairn as Bran Stark and Hodor.

  • Tyrion Lannister

  • Renly Baratheon

    Gethin Anthony as Renly Baratheon.

  • Arya Stark

    Maisie Williams as Arya Stark.

  • Daenerys Targaryen

  • Samwell Tarly

Earlier on HuffPost: