Teenage Mutant Ninja Turtles Adventures #6

Synopsis

After a local bayou thief steals a magical gem called the Turnstone from Mary Bones, the old crone catches up to him in the city and uses the stone to transform him into an alligator creature. Shredder tries to trick Leatherhead into thinking that the Turtles are villains who hold the secret to his return to humanity but his deception is quickly revealed once Leatherhead tangles with the heroes.