"Möbius Dick" is the fifteenth episode of the sixth season of the animated sitcom Futurama, and originally aired August 4, 2011 on Comedy Central. The episode was written by Dan Vebber and directed by Dwayne Carey-Hill. In the episode, the Planet Express crew pass through an area in space known as the Bermuda Tetrahedron, where many other ships passing through the area have mysteriously disappeared, including that of the first Planet Express crew. While exploring the area, a mysterious four-dimensional space whale devours the ship's engine, leaving them stranded in the area. The ship's captain, Leela, becomes obsessed with hunting down the whale.