Which episode depicts the Battle of Winterfell against the Army of the Dead?

The Game of Thrones episode depicting the Battle of Winterfell against the Army of the Dead is “The Long Night.” It is the third episode of season 8 and first aired on April 28, 2019.

The episode takes place almost entirely at Winterfell, where the living armies of the North, Daenerys Targaryen, and their allies defend the castle against the Night King’s undead forces. The battle includes the destruction of the Army of the Dead, the deaths of several major characters, and Arya Stark’s killing of the Night King in the godswood.

“The Long Night” is often confused with “Hardhome” or “The Watchers on the Wall,” earlier episodes that also feature major confrontations with the dead or the wildlings. It is also distinct from “The Bells,” which centers on Daenerys’s attack on King’s Landing later in season 8. The episode’s title recalls the legendary winter in Westerosi history when the White Walkers first descended on the world.