The episode explores the various degrees to which humanity tends to regard "religion" by following Bender, a robot. The episode was featured in the Monster Robot Maniac Fun Collection DVD box set and received positive reviews by critics.
The story begins with Bender, Fry and Leela at a Beastie Boys' heads concert, where they are invited backstage afterward by an old acquaintance of Bender's, Fender. While meeting the Beastie Boys, Bender and Fender ditch the "organ sacks" and Bender is introduced to "jacking-on", the dangerous abuse of electricity.
Soon Bender's dabbling becomes a full blown addiction to electricity and he resorts to desperate measures to get his fixes (such as forcing the Planet Express Ship to fly through an electrical storm). After hitting rock bottom, Bender realizes he has a problem and turns to religion for help: joining the Temple of Robotology. He is then baptized in oil and has Robotology's symbol welded onto his chest by Reverend Lionel Preacherbot.
While the rest of the Planet Express crew is initially happy that Bender has given up his addiction, they quickly find the new Bender tiresome and try to bring out their friend's old personality by taking him to Atlantic City and reintroducing him to vice. They succeed in bringing the old Bender back, but are unaware that the contract of Robotology stipulates that if Bender sins, he is sent to Robot Hell for all eternity. Soon the Robot Devil abducts him as he seduces several fembots.
As Fry and Leela track Bender to The Inferno ride at Reckless Ted's Funland, using Nibbler as a bloodhound, Bender is shown around Robot Hell by the Robot Devil in the form of a song. Eventually Fry and Leela use the Fairness in Hell Act of 2275 to challenge the Robot Devil to a fiddle contest for Bender's soul and a solid gold fiddle. If they lose, they get a small silver fiddle and the Robot Devil gets to kill Fry. While they are unable to best the devil in musical skill, Leela beats the Devil with the solid gold fiddle and the trio flee Robot Hell with a pair of stolen robotic wings. The Robot Devil attempts to stop them by closing the ceiling gates. Luckily, the trio are able to escape by dropping the gold violin Leela was carrying, which was adding weight to their ascent. Once they are out of Robot Hell, Bender promises to be just evil/good enough.
The Golden Fiddle may in fact be a reference to The Charlie Daniels Band's "The Devil went down to Georgia", where a young boy faces off against the Devil in a fiddle battle, eventually winning the Golden Fiddle from him and banishing him back to Hell.