In the fourth episode of His Dark Materials , "Armour," Lyra travels to Trollesund to recruit Iorek Byrnison, an exiled Panserbjørn whose identity is inseparable from his stolen sky-iron armor. Lyra uses her alethiometer to locate the armor and secure Iorek's loyalty, cementing her reputation as "Silvertongue" while initiating the journey north with aeronaut Lee Scoresby. Read a detailed recap of the episode at Comics Beat .