My clues for this one are pretty self-explanatory. Hempstead is a town in Nassau, and Isaac was the Biblical sacrifice (not really, of course, Yahweh was just joking around). All the same, I was astonished when some of you managed to puzzle them out. Isaac is a bright young talent and he gave a great reading, but I figured he was google-proof. Not so. I'm looking forward to seeing him bring Bran to life.
Also cast, as his uncle and Lord Eddard's younger brother Benjen, a ranger of the Night's Watch, is Joseph Mawle.
Another fast-rising British actor, Mawle has portrayed both Jesus and Judas, starred in a film called FREEFALL, and began his acting career at the Tobacco Factory Theater. Check out his showreel at http://www.josephmawle.com/main.html for a sample of his talents.