The big revelation in this episode is at the very end, where the Nights King, a character only mentioned in the books but never shown, is confirmed, and he makes his presence known by taking one of Crasters sons and turning him into a White Walker. The downside of this episode is Dany ignoring Barristan Selmys good advice to show mercy and spouting off another one of her awesome one liners: I will answer injustice with justice! Where exactly has all this braggadocio talk led her?