The Simpsons: 10 Greatest Rock Star Moments

10. Judas Priest (S25 E09 “Steal This Episode”)

Judas Priest’s cameo in season 25's "Steal This Episode", though brief, managed to stir up some controversy among viewers. When Homer tires of overpriced cinema tickets and endless pre-film adverts, Bart teaches him how to pirate films online. After setting up a backyard "Cinema Pirate-diso" for his family and friends, Homer is sought by the FBI for movie piracy (after Marge sends a cheque and tell-all letter to Hollywood).

When Homer later escapes the prison bus, he and his family decide to hole up in the town’s Swedish consulate, due to the country's more relaxed views on piracy. In an attempt to smoke them out, the FBI begins “blasting death metal”, by having Judas Priest perform “Copyright Law” (a cheesy parody of "Breaking the Law").

While fans were glad to see Priest finally make an appearance on the show, the labelling of the band as "death metal" caused an uproar, resulting in The Simpsons apologising for the misnomer, by having Bart write “Judas Priest is not death metal” during the following episode’s chalkboard gag.