Takes some inspiration from Brainiac's first comic appearance in Action Comics #242. In that issue, Brainiac miniaturized cities from other worlds, including Krypton and stole them. Superman defeated him and saved the Kryptonian Bottled City of Kandor and took it back to his Fortress of Solitude. In this episode, Brainiac stole data and information from other worlds. Superman defeats him and takes the Krypton memory module back to what would become his Fortress.
First appearance of the arctic cavern which would eventually become the Fortress of Solitude.