Synopsis by Mark Deming
After attending his first rock concert, with veteran British heavy metal band Spinal Tap headlining, Bart Simpson (voice of Nancy Cartwright) develops a new career goal -- he wants to be a guitarist in a rock band. Actually attempting to encourage Bart's interests for a change, his parents, Homer (voice of Dan Castellaneta) and Marge (voice of Julie Kavner), buy Bart an electric guitar, but try as he might, Bart can't master it. Bart is convinced that something is wrong with the guitar, until Otto (voice of Harry Shearer), the burnt-out school bus driver, demonstrates that the guitar is just fine with some blazing hard rock riffs. However, Otto's guitar heroics put the bus off its schedule, and when he gets into an accident en route, it's discovered Otto doesn't have a driver's license. Otto, of course, loses his job, and Bart, feeling responsible, takes him into the Simpson home, though neither Homer or Marge are especially happy about his presence. "The Otto Show," first aired on April 23, 1992; the fictional heavy metal band Spinal Tap were voiced by Christopher Guest, Michael McKean, and Simpsons regular Harry Shearer.