The Simpson household's overrun with puppies---the offspring of Santa's Little Helper and his new girlfriend from which Mr. Burns would love to make a greyhound-skin tuxedo.

Bart winds up in the hospital as a result of eating Krusty cereal, and when Lisa comes to visit him, she is reunited with her sax idol, who recounts his big break on "The Tonight Show.".  Blackboard: 'Nerve gas is not a toy'.