robot is designed after the ED-209 from the film RoboCop and its accompanying series. Lisa's fourth cat, Coltrane, is named after the influential jazz performer John Coltrane. The robot Circuit Ray Leonard is based on the boxer Sugar Ray Leonard. The song playing while Homer fights Professor Frink's robot is "...In A Bag" by Static-X. While Lisa is preparing food for Snowball III, she sings a song with the same melody as the Hokey Pokey song. Reception DVD Movie Guide's Colin Jacobson was critical of the episode, saying it "starts pretty well but droops before too long. The robot theme is too silly, and the cat sequences are too morbid. Some of the battle bots bits amuse, but they're not enough to overcome the episode's general flaws." External links "I, (Annoyed Grunt)-Bot" at The Simpsons.com 2004 American television episodes The Simpsons (season 15) episodes Television episodes about robots Robot combat