Daenerys and the east
42 episodes of Game of Thrones carry this thread, 1d 18h in all — 37 of them are in The Essentials.
Arc membership is derived from each episode's own title and summary text. It shows where a thread is foregrounded, not every episode it touches.
In airing order

Lord Eddard Stark, ruler of the North, is summoned to court by his old friend, King Robert Baratheon, to serve as the King's Hand. Eddard reluctantly agrees after learning of a possible threat to the King's life. Eddard's bastard son Jon Snow must make a painful decision about his own future, while in the distant east Viserys Targaryen plots to reclaim his father's throne, usurped by Robert, by selling his sister in marriage.

Daenerys must realize her destiny. Jaime finds himself in an unfamiliar predicament.

War grips the continent of Westeros. As Tyrion Lannister tries to take his strong-willed nephew in hand in King's Landing, Stannis Baratheon launches his own campaign to take the Iron Throne with the help of a mysterious priestess. In the east, Daenerys must lead her retinue through a desolate wasteland whilst beyond the Wall the Night's Watch seeks the aid of a wildling.

Tyrion attempts to restrain Joffrey's cruelty. Catelyn attempts to broker a peace between Stannis and Renly. Daenerys and her followers arrive at the great city of Qarth and hope to find refuge there. Arya and Gendry arrive at Harrenhal, a great castle now under Lannister occupation.

Confusion rages in the Stormlands in the wake of a devastating reversal. Catelyn must flee with a new ally, whilst Littlefinger sees an opportunity in the chaos. Theon seeks to prove himself to his father in battle. Arya receives a promise from the enigmatic Jaqen H'ghar. The Night's Watch arrives at the Fist of the First Men. Daenerys Targaryen receives a marriage proposal.

Arya has a surprise visitor; Dany vows to take what is hers; Joffrey meets his subjects; Qhorin gives Jon a chance to prove himself.

Jaime meets a relative; Theon hunts; Dany receives an invitation.

Tyrion awakens to a changed situation. King Joffrey doles out rewards to his subjects. As Theon stirs his men to action, Luwin offers some final advice. Brienne silences Jaime; Arya receives a gift from Jaqen; Dany goes to a strange place; Jon proves himself to Qhorin.

Jon is brought before Mance Rayder, the King Beyond the Wall, while the Night's Watch survivors retreat south. In King's Landing, Tyrion asks for his reward. Littlefinger offers Sansa a way out. Cersei hosts a dinner for the royal family. Daenerys sails into Slaver's Bay.

Tyrion shoulders new responsibilities. Jon is taken to the Fist of the First Men. Daenerys meets with the slavers. Jaime strikes a deal with his captors.

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.

Daenerys exchanges gifts with a slave lord outside Yunkai. As Sansa frets about her prospects, Shae chafes at Tyrion's new situation. Tywin counsels the king, and Melisandre reveals a secret to Gendry. Brienne faces a formidable foe in Harrenhal.

King's Landing hosts a wedding, and Tyrion and Sansa spend the night together. Daenerys meets the Titan's Bastard. Davos demands proof from Melisandre. Sam and Gilly meet an older Gentleman.

Robb presents himself to Walder Frey, and Edmure meets his bride. Jon faces his harshest test yet. Bran discovers a new gift. Daario and Jorah debate how to take Yunkai. House Frey joins with House Tully.

Joffrey challenges Tywin. Bran tells a ghost story. In Dragonstone, mercy comes from strange quarters. Daenerys waits to see if she is a conqueror or a liberator.

Tyrion welcomes a guest to King's Landing. At Castle Black, Jon Snow finds himself unwelcome. Dany is pointed to Meereen, the mother of all slave cities. Arya runs into an old friend.

Tyrion lends Jaime a hand. Joffrey and Margaery host a breakfast. At Dragonstone, Stannis loses patience with Davos. Ramsay finds a purpose for his pet. North of the Wall, Bran sees where they must go.

Tyrion ponders his options. Tywin extends an olive branch. Sam realizes Castle Black isn't safe, and Jon proposes a bold plan. The Hound teaches Arya the way things are. Dany chooses her Champion.

Dany balances justice and mercy. Jaime tasks Brienne with his honor. Jon secures volunteers while Bran, Jojen, Meera and Hodor stumble on shelter.

Cersei and Tywin plot the Crown's next move. Dany discusses future plans. Jon embarks on a new mission.

Stannis and Davos set sail with a new strategy. Dany meets with supplicants. Tyrion faces down his father in the throne room.

Tyrion enlists an unlikely ally. Daario entreats Dany to allow him to do what he does best. Jon's warnings about the Wall's vulnerability fall on deaf ears. Brienne follows a new lead on the road with Pod.

An unexpected arrival north of the Wall changes circumstances. Dany is forced to face harsh realities. Bran learns more of his destiny. Tyrion sees the truth of his situation.

Varys discusses a conspiracy with Tyrion; Daenerys' rule faces a new threat; Jon finds himself between two kings; and Cersei and Jaime try to move on from Tywin's demise.

Dany makes a difficult decision in Meereen. Jon recruits the help of an unexpected ally. Brienne searches for Sansa. Theon remains under Ramsay's control.

Arya trains. Jorah and Tyrion run into slavers. Trystane and Myrcella make plans. Jaime and Bronn reach their destination. The Sand Snakes attack.

Stannis confronts a troubling decision. Jon returns to The Wall. Mace visits the Iron Bank. Arya encounters someone from her past. Dany reluctantly oversees a traditional celebration of athleticism.

Cersei seeks forgiveness; Jon faces a new challenge; Arya plots to cross a name off her list; Tyrion sees a familiar face; and Daenerys finds herself surrounded by strangers.

Jon Snow is dead. Daenerys meets a strong man. Cersei sees her daughter again.

Daenerys meets her future. Bran meets the past. Tommen confronts the High Sparrow. Arya trains to be No One. Varys finds an answer. Ramsay gets a gift.

Tyrion strikes a deal. Jorah and Daario undertake a difficult task. Jaime and Cersei try to improve their situation.

Ramsay surprises his audience. Jon retaliates. Dany is true to her word.

Alliances are made, the High Sparrow is holding trials at King's Landing, Daenerys is sailing for the Seven Kingdoms and a new King of the North is crowned.

Jon organizes the defense of the North. Cersei tries to even the odds. Daenerys comes home.

Daenerys receives an unexpected visitor. Jon faces a revolt. Tyrion plans the conquest of Westeros.

Daenerys holds court. Cersei returns a gift. Jaime learns from his mistakes.

Arya gets to the final destination. Daenerys takes it upon herself to strike back.

Daenerys demands loyalty from the surviving Lannister soldiers; Jon heeds Bran's warning about White Walkers on the move; Cersei vows to vanquish anyone or anything that stands in her way.

Cersei sits on the Iron Throne; Daenerys sails across the Narrow Sea; Jon Snow is King in the North, and winter is finally here.

Arriving at Winterfell, Jon and Daenerys struggle to unite a divided North. Jon gets some big news.

Varys betrays his queen, and Daenerys brings her forces to King's Landing.

In the aftermath of the devastating attack on King's Landing, Daenerys must face the survivors.