Two heroes are turned against each other in a Justice League Unlimited episode that aired on this day in television history.
“Clash” is the 7th episode of the 2nd season of the Cartoon Network animated series, Justice League Unlimited. Written by J. M. DeMatteis, with story by Dwayne McDuffie, it first aired on June 11th, 2005.
As the optimistic Captain Marvel joins the Justice League, he comes into conflict with Superman over supposedly pro-Lex Luthor remarks. Eventually, thanks to some master manipulation, the two iconic heroes end up battling each other.
The episode was part of the Cadmus arc that stretched over several episodes of the show’s first two seasons.