The DC Kids YouTube channel has posted a video from “Superman: The Animated Series”.
Lex Luthor recruits a dangerous criminal named John Corben to be transformed into Metallo, a skin-covered cyborg with a Kryptonite heart, and Superman must do all he can to stop the villain.
This is taken from the episode titled “The Way of All Flesh,” the sixth episode of the first season of “Superman: The Animated Series,” which first aired on September 21, 1996.

TAS is better than any WB show on today.