Futurama S00 E05 Bender's Game

"Defying gravity and common sense."

With fuel prices skyrocketing, the Planet Express crew sets off on a dangerous mission: to infiltrate the world's only dark-matter mine, source of all spaceship fuel. But deep beneath the surface lies a far stranger place...a medieval land of dragons and sorcery and intoxicated knights who look suspiciously like Bender.