Lex Luthor is the main antagonist of the Superman: The Animated Series episode "Brave New Metropolis". He is a version of the series' main villainwho exists in an alternate reality as the dictator of Metropolis.
As with the version of Luthor portrayed in the mainstream DC Animated Universe, this version of the character is voiced by Clancy Brown, who also portrayed Byron Hadley in The Shawshank Redemption, Mr. Krabs in Spongebob Squarepants, The Kurgan in Highlander, Surtur in Thor: Ragnarok, Gunmar in Tales of Arcadia, Mr. Freeze and Bane in The Batman, Taskmaster in Avengers Assemble, Rahzar in the 2012 animated Teenage Mutant Ninja Turtles series, Baron Praxis in Jak and Dexter, Bloodwolf in Puss in Boots, Ray Schoonover in Daredevil, General Wade Eiling in The Flash, the Evil Entity in Scooby-Doo! Mystery Incorporated, Hades in God of War, Rhino in The Spectacular Spider-Man, Kurt Caldwell in Dexter: New Blood, Long Feng in Avatar: The Last Airbender, Dr. Neo Cortex and Uka Uka in Crash Bandicoot, Mascumax in The Powerpuff Girls, Kojak in Recess!: School's Out, Undertow in The Little Mermaid II: Return to the Sea, Hakon in Gargoyles, Viking Lofgren in Bad Boys, Parallax in Green Lantern, Silas in Transformers Prime, and Savage Opress in Star Wars: The Clone Wars.