After failing a magazine test on being a good father, Homer decides to help Bart out with his Soapbox Derby race car -- and soon is left out when Martin gives Bart his race car (after crashing into a wall and getting sent to the hospital) so he can win against Nelson Muntz. Meanwhile, Patty and Selma get their hair styled like MaryTylerMoore.

!!This episode has the following tropes:
* GracefulLoser: Nelson once Bart beats him in the finals of the Soapbox Derby races.
* OhNoNotAgain: "Oh dear god, not again!"
* StylisticSuck: Little Lightning.
* WhatCouldHaveBeen: Homer was originally gonna say "I'm not the bad father, you're the bad father. Leave me alone."