In the latest episode, Walt decides to do something special to celebrate what would have been the centennial of the late, great Jack "The King" Kirby -- and befitting of comic book royalty, the Stash decides to pull out all the stops.

Rolling out the red carpet for Kirby's two grandchildren, the Stash brings together cosplayers and fans of Kirby's most memorable creations. But the Kirbys have brought along a gift of their own: a never-before-seen piece of Kirby concept art.

Plus, a customer brings in the first appearance of the Black Panther.

Watch the episode now on amc.com and AMC apps for mobile, Fire TV, XBox One, Apple TV, Roku and Chromecast.

Comic Book Men airs Sundays Midnight/11c.