The featurette has showrunners David Benioff and D.B. Weiss discussing the episode's most shocking moments, including Bran's vision of the past, the death of Roose Bolton, and – most shocking of all – the resurrection of Jon Snow, which came after Davos Seaworth convinced Melisandre to make the attempt.
"Davos has no real love loss for Melisandre," Weiss explains. "He's seen what she's capable of. He's seen her do many impossible things. He's not a big fan of her god. He's not a big fan of her program, but there's certainly nothing to lose at this point."
Game of Thrones airs Sundays at 9 p.m. ET on HBO.