I've been searching for over an hour and no matter what key words I use, I can't find a specific episode.
I swear the villain in question is Metallo. Superman (or somebody else) gets him sucked into a boom tube, which spills Metallo out into space. He catches fire, his face melts, the music becomes disturbing and we see him flying straight into the sun.
I swear the villain in question is Metallo. Superman (or somebody else) gets him sucked into a boom tube, which spills Metallo out into space. He catches fire, his face melts, the music becomes disturbing and we see him flying straight into the sun.