S4E9 · The Watchers on the Wall

Complete story — includes the ending

The Night's Watch prepares the Castle Black defences ahead of the upcoming battle with the Wildlings. Gilly and Little Sam escape Mole's Town and arrive at Castle Black, where Sam hides them. The Wildlings attack from both sides of the wall and Pyp is killed by an arrow from Ygritte. Tormund's army breaks through from the south and engages the Night's Watch, while the Wildlings climbing the wall are obliterated by a massive swinging scythe trap. A giant breaches the tunnel into Castle Black but is killed by Grenn and five others, at the cost of their own lives. Alliser Thorne is wounded in a duel with Tormund and forced to withdraw, leaving Jon to take charge of the defence. After seeing Jon kill Styr, Ygritte aims her bow at him but hesitates, then is fatally shot by Olly, dying in Jon's arms. Assisted by Ghost, Jon's direwolf, the Night's Watch secure Castle Black's inner keep, and a wounded Tormund is captured. The Wildlings retreat for the night. Jon goes beyond the Wall on a suicide mission to find and kill Mance Rayder, believing that the Wildling army will fragment without his command.