Lex Luthor (series star CLANCY BROWN) discovers Superman's Achilles' heel: A deadly vulnerability to Kryptonite. Armed with this lethal information, the vile fiend sets out to destroy the Man of Steel once and for all.
Superman is the target of yet another of Lex Luthor's evil schemes. Lex Luthor transforms terrorist John Corben into Metallo (recurring guest star voice Malcolm McDowell), a flesh and metal Kryptonite-hearted cyborg with evil intent and no emotions. Metallo's only mission is to destroy Superman. But once he discovers that he is more machine than man, Metallo attacks his creator and Superman must save Luthor from his own invention.
Brainiac (recurring guest star voice Corey Burton), once Krypton's all-knowing planetary computer, comes to Earth as part of his information-gathering trek across the galaxy. But, as Superman discovers, Brainiac's intent after gathering the world's knowledge is to destroy the Earth.
Lobo (recurring guest star voice Brad Garrett), the infamous intergalactic bounty hunter, has been hired by the Preserver (recurring guest star voice Sherman Howard) to capture Superman, the last known survivor of his race. Lobo and Superman fight their way into deep space, where the double-crossing Preserver captures them both--Lobo is also the last of his kind. Part 1 of 2.
Superman and Lobo (recurring guest star voice Brad Garrett) join forces to escape the Preserver (recurring guest star voice Sherman Howard) and a wicked band of competing bounty hunters. After Lobo escapes to a tropical paradise, Superman transfers the Preserver's prisoners to the Fortress of Solitude. Part 2 of 2.
The Flash (guest star voice CHARLIE SCHLATTER) teams with Superman to confront Mark Mardon (guest star voice MIGUEL FERRER), AKA "The Weather Wizard," who holds Metropolis hostage with the threat of unleashing a killer hurricane.
