1. The Serfsons -

: The family is arrested for practicing magic. King Quimby orders Lisa to use her powers to revive a legendary dragon to save the kingdom from an invading army of White Walkers.

: Marge's mother, Jacqueline, is turning into an "ice walker." To save her, Lisa uses illegal magic to turn lead into gold to buy a healing amulet. 1. The Serfsons

: Nikolaj Coster-Waldau (Jaime Lannister from Game of Thrones ) guest stars as Marge's twin brother, Markery. Why It’s Significant : The family is arrested for practicing magic

: The most discussed aspect of the episode is its eerie similarity to the "Bells" episode of Game of Thrones , where a dragon destroys a city. where a dragon destroys a city.