Bender's GameIgnoring Professor Farnsworth's orders to conserve fuel due to a rise in dark matter prices, Leela borrows the Planet Express ship to enter a demolition derby after being insulted by rednecks. They win it, however the ship is wrecked, but due to botched laser eye surgery, the Professor only notices that the fuel has been used. As punishment, Leela is fitted with a shock collar to teach her anger management. Meanwhile, Bender finds Cubert and Dwight playing Dungeons & Dragons with their friends, but he cannot join in since, as a robot, he has no imagination. After several tries at imagining things, Bender manages to imagine himself as a medieval knight named "Titanius Anglesmith, fancy man of Cornwood" and enters the game. Unfortunately, he soon gets lost in his fantasy and goes on a rampage, resulting in his commitment to the Hal Institute for Criminally Insane Robots.The crew learns that Mom, who controls the world's only Dark Matter mine, is restricting the supply in order to drive up profits. The Professor reveals to the crew that while working for her many years ago, he stumbled on a way to turn dark matter from a useless curiosity into starship fuel. The process created two energy crystals, with Mom keeping one for herself and Farnsworth hiding the other, "anti-backwards" crystal. If the two crystals are brought together, they will render all dark matter useless. Farnsworth has forgotten where he hid his crystal, but it is being used as a 12-sided die in the kids' D&D game. Mom determines its location and sends her sons Walt, Larry and Igner to retrieve it, by saying that they are owl exterminators, but Farnsworth foils their attempt by sending an angry owl at them, messing up their plan since they do not know how to exterminate owls. Farnsworth, Fry, and Leela fly to Mom's mine with the crystal in order to neutralize the dark matter.