This all-new clip from BATMAN: THE DARK KNIGHT RETURNS, PART 1 features The Mutant Leader giving his televised declaration of war on Gotham City, Commissioner Gordon and Batman. The Mutant Leader is voiced by Gary Anthony Williams, best known for his recurring roles on “Malcolm in the Middle” and “Boston Legal,” as well as voiceovers as Riff Tamsom on “Star Wars: The Clone Wars,” Uncle Ruckus on “The Boondocks,” and Mongul in “Batman: The Brave and the Bold.” Williams’ casting as the bad-to-the-bone Mutant leader belies his true calling in comedy – he is co-founder and artistic director for the L.A. Comedy Shorts Film Festival in Hollywood.