"Game of Thrones" Season 6, Episode 5 is titled "The Door." The episode focuses on several key events and developments, including the exploration of the origins of the White Walkers and the unraveling of a major mystery.
In the North, Bran Stark continues his training with the Three-Eyed Raven, learning about the history of the Children of the Forest and the creation of the White Walkers.
In Meereen, Tyrion Lannister continues to work with the slave masters, trying to broker a deal to keep the peace in the region. However, the Sons of the Harpy continue to pose a threat, and Daenerys must make a difficult decision to secure her rule.
In the Riverlands, Brienne and Podrick arrive at Riverrun, where they meet with Jamie Lannister and the Freys, who are laying siege to the castle in an attempt to reclaim it for House Frey.
In Braavos, Arya Stark continues her training with the Faceless Men, but struggles with her loyalty to her family and her own identity.
In the East, Yara Greyjoy and Theon continue their journey to meet with Daenerys, as they try to win her support in reclaiming the Iron Islands.
The episode ends with a major revelation, as Bran Stark discovers the truth about Hodor and his origins, revealing that his powers as a warg allowed him to warg into a young Wylis, causing him to be trapped in the present as the simple-minded Hodor, holding the door against the White Walkers to protect Bran and Meera.
In summary, "The Door" is the fifth episode of "Game of Thrones" Season 6 and focuses on several key events and developments, including the exploration of the origins of the White Walkers and the unraveling of a major mystery. Bran Stark continues his training with the Three-Eyed Raven, learning about the history of the Children of the Forest and the creation of the White Walkers. Tyrion Lannister continues to work with the slave masters in Meereen, while Brienne and Podrick arrive at Riverrun to meet with Jamie Lannister and the Freys. Arya Stark continues her training with the Faceless Men in Braavos, and Yara Greyjoy and Theon continue their journey to meet with Daenerys. The episode ends with a major revelation, as Bran discovers the truth about Hodor and his origins, revealing that his powers as a warg caused him to be trapped in the present as the simple-minded Hodor.