Episode Title:Back to School.Episode Description:The Nexo Knights return to the Knights Academy partly to get re-educated under the headmaster Sir Bricklyn and partly because Jestro and the Book of Monsters are after another spellbook that is located there. The education does not go easily for the Nexo Knights, they leap at the opportunity when Jestro and the Book of Monsters unleash the Lava Monsters on the Knights Academy. Although the Nexo Knights were successful at preventing Jestro and the Book of Monsters from stealing the spellbook, Jestro managed to steal a snowglobe that Merlok gave to Sir Brickly for safekeeping. When Jestro breaks the snow globe, it turned out to contain a monster castle that Merlok had shrunk and sealed away many years ago.