The official words of House Lannister, which Bran fails to remember, are "Hear Me Roar!" Their unofficial motto, "A Lannister always pays his debts", is also mentioned by Tyrion in the same episode. "Hear Me Roar" is mentioned only rarely in both the books (chapter 56 of the first novel) and the show (The Winds of Winter (2016)), possibly because the popular motto is used so often in its place that hardly anyone remembers the official words.
Written on the wall of Tyrion's sky cell "Gods save me, the blue is calling."
Kate Dickie (Lysa Arryn) wore a fake breast over her undergarments to simulate the breastfeeding of her son.
In the novels, the homosexual relationship between Renly and Loras is only implied, while in the show it is openly depicted.