In episode 5 of season 3, we get nudity from Will Tudor, Nikolaj Coster-Waldau and Kit Harington.
Will Tudor is naked in bed 51 minutes in the movie. As the steps out of the bed, we see his nice uncut penis. The picture is a bit dark. Then Will Tudor gets back in bed with his lover, and we see his bubble butt and somewhat hairy crack.
Nikolaj Coster-Waldau is naked 35 minutes in the movie, and steps in a hot tub. We get a good view at his butt and balls as he steps down in the tub.