The Cube is Jim Henson’s little-known proto-Black Mirror masterpiece

That sure is a man in a cube, alright. | Image: NBC / Jim Henson Company I'm sure we're all familiar with Dark Crystal , so we know that Jim Henson can be weird and tackle slightly more mature subject matter. But there is little in his oeuvre that is quite as mind-bending as the Muppetless The Cube .