The first-ever screen appearance of 12-year-old actress Bella Ramsey as the 10-year-old Lady of Bear Island, Lyanna Mormont. Despite her youth and inexperience, Ramsey would go on to be widely praised as the season's breakout star for her scene-stealing performance as the fierce, no-nonsense young leader, as well as become the subject of countless internet memes lampooning the character's ferocity and intimidating nature (e.g. suggesting that the Wall was built by White Walkers to keep her out of the North).
Bear Island and Deepwood Motte appear on-screen for the first time in the show. Bear Island was mentioned as early as the pilot episode, as it is the home of Jorah Mormont. Deepwood Motte was first referred to on the show when Yara Greyjoy got orders to invade it in What Is Dead May Never Die (2012). Although Lord Glover mentions bitterly that Robb Stark never came to his aid, this is not completely true; in The Old Gods and the New (2012), Robb was fully willing to return North to deal with the Ironborn, but Roose Bolton offered to send his son Ramsey instead. Ramsay and the Glovers eventually retook Deepwood Motte together off-screen in Home (2016).
This is the first episode since You Win or You Die (2011) in which we see Jaime in traditional Lannister armor. From Season 4 onward, he had only been seen wearing the armor of the Kingsguard.
First time to have a scene before the opening credits since the fourth season premiere Two Swords (2014).