Disney’s Adventures of the Gummi Bears Season 4 Episode 5 He Who Laughs Last Episode Title: He Who Laughs Last Episode Description: Sir Gawain finds himself challenged by Lord Willoughby to prove Gummi Bears exist, after being fed up with his stories. His search soon leads to him being captured by the Gummi Bears, who assume he stole Zummi's medallion. Learning they need it in order to remove a curse on Tummi that is turning him into a tree, Gawain realizes the medallion was likely found by Willoughby when they were searching the woods, and agrees to help Zummi recover it.