Encouraged by the Red Wedding slaughter in the Riverlands that wiped out many of their Stark nemeses, the Lannisters' hold on the Iron Throne remains intact... but can they survive their own egos, as well as new and ongoing threats from the south, north and east?
While an unbowed Stannis Baratheon continues to rebuild his army in Dragonstone, a more immediate danger comes from the south, as Oberyn Martell, the Lannister-loathing "Red Viper of Dorne," arrives at King's Landing to attend Joffrey's wedding to Margaery Tyrell, and perhaps act on an ulterior agenda.
In the north, a depleted Night's Watch seems overmatched against the inexorable Wall advances of Mance Rayder's army of wildlings, which in turn is being trailed by an even more formidable foe: the undead White Walkers.
As if that weren't enough, Daenerys Targaryen, accompanied by her menacing trio of dragons and army of Unsullied, is poised to liberate Meereen, the largest city in Slaver's Bay, which could ultimately provide her with enough ships to sail to Westeros and reclaim the Iron Throne.
Based on the bestselling fantasy book series by George R.R. Martin, the hit series is an epic story of treachery and nobility set on the continent of Westeros, where summers and winters can last years, and only the lust for power is eternal.
Returning series regulars on Game of Thrones this season include: Peter Dinklage (Tyrion Lannister), Nikolaj Coster-Waldau (Jaime Lannister), Lena Headey (Cersei Lannister), Emilia Clarke (Daenerys Targaryen), Charles Dance (Tywin Lannister), Aidan Gillen (Petyr "Littlefinger" Baelish), Jack Gleeson (Joffrey Baratheon), Kit Harington (Jon Snow), Diana Rigg (Lady Olenna Tyrell), Sophie Turner (Sansa Stark), Maisie Williams (Arya Stark) and Isaac Hempstead Wright (Bran Stark).
Additional returning series regulars this season include: Alfie Allen (Theon Greyjoy), Jerome Flynn (Bronn), Conleth Hill (Varys), John Bradley (Samwell Tarly), Gwendoline Christie (Brienne of Tarth), Liam Cunningham (Davos Seaworth), Stephen Dillane (Stannis Baratheon), Natalie Dormer (Margaery Tyrell), Iain Glen (Jorah Mormont), Kristofer Hivju (Tormund Giantsbane), Sibel Kekilli (Shae), Rose Leslie (Ygritte), Rory McCann (Sandor "The Hound" Clegane), Michael McElhatton (Roose Bolton), Iwan Rheon (Ramsay Snow) and Carice van Houten (Melisandre).
Returning cast members include: Jacob Anderson (Grey Worm), Thomas Brodie-Sangster (Jojen Reed), Nathalie Emmanuel (Missandei), Ciaran Hinds (Mance Rayder), Finn Jones (Loras Tyrell), Ellie Kendrick (Meera Reed), Kristian Nairn (Hodor) and Gemma Whelan (Yara Greyjoy).
New cast members for the fourth season include: Pedro Pascal (Oberyn Martell), Indira Varma (Ellaria Sand, Oberyn's paramour), Roger Ashton-Griffiths (Lord Mace Tyrell), Michiel Huisman (Daario Naharis, a mercenary ally to Daenerys), Yuri Kolokolnikov (Styr, a wildlings chief) and Hafþór Júlíus Björnsson (Ser Gregor Clegane, a.k.a. "The Mountain").
The executive producers of Game of Thrones are David Benioff, D.B. Weiss, Carolyn Strauss, Frank Doelger and Bernadette Caulfield; co-executive producers, Guymon Casady, Vince Gerardis and George R.R. Martin; producers, Chris Newman and Greg Spence.