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Superman defeats out-of-this-world dangers like Mermen living beneath the Earth's core, energy-controlling aliens and time-traveling magicians. Favorite villains the Toyman, Brainiac and archnemesis Lex Luthor also challenge the Man of Steel, but he doles out justice with a simple mantra. These adventures were the first time that Superman (and his alter ego Clark Kent), Lois Lane, and Perry White had been seen in animated form.