Game of Thrones - Season 8, Episode 3 Synopsis
 

Episode 8 - 3
Title: "The Long Night"
Directed by Miguel Sapochnik
Written by David Benioff & D. B. Weiss
Original Air Date - April 28, 2019

The Living Army meets the Army of the Dead outside Winterfell. The Dothraki are obliterated first, then the Unsullied are overwhelmed. Edd is killed after saving Sam. The survivors retreat into the castle while Melisandre ignites the defensive fire trench surrounding Winterfell to delay the advancing horde. Jon and Daenerys engage the Night King on their dragons. The wights invade Winterfell, overpowering the defenders and killing Lyanna Mormont. Beric dies defending Arya, whom Melisandre helps realize her destiny to deny the God of Death on that day. Jon and Rhaegal knock the Night King off Viserion; Daenerys commands Drogon to burn the Night King, but dragon fire has no effect. The Night King raises slain Winterfell defenders, including the dead entombed in the crypt where the non-combatants are attacked. When swarming wights pull Daenerys from Drogon, Jorah is fatally wounded defending her. The Night King arrives at the Godswood for Bran and kills Theon. Arya ambushes the Night King, stabbing him with her Valyrian steel dagger. The Night King and his White Walkers disintegrate, and Viserion and the wights collapse. Her purpose served, Melisandre leaves Winterfell and falls dead from old age.

Source: https://en.wikipedia.org/wiki/Game_of_Thrones_(season_8)