The title of episode 9 is "The Battle of the Bastards" - presumably referring to the epic Jon Snow vs Ramsay Bolton face-off that's been teased all season.
The Thrones showrunners have previously told us that season 6 includes the biggest battle in the show's history.
The running time is 60 minutes, which is firmly on the long side. That episode airs June 19.
The title of the finale is "The Winds of Winter" - a nod to George R R Martin's forthcoming sixth novel in his A Song of Ice and Fire Saga (which was also given a verbal shout-out by the theater troupe in Braavos earlier this season).