In the Stone Age, ancient counterparts of the Simpsons portray The Invention of Motherhood as Marge tries to keep Homer, Bart, Lisa and Maggie under control.
In the garage, Lisa finds a rare Morgan car, left by the previous owner of the house and Homer decides to keep it.
Homer seizes an opportunity to cheer her up when he sells Jay Leno his newly found car, and has the money for a trip.
After putting down the plate, Bart finds out the alley is filled with starving paper-thin models for Paris Fashion Week.
They chase them to the rue des Lombards, where Homer and Lisa hide in one of the three main jazz clubs, leaving the briefcase behind near a statue.
However, back at the hotel, they are arrested by the police (French Wiggum, Eddie and Lou counterparts) after the contractors called them and having been informed of both Bart's and Lisa's shenanigans.
Executive producer Al Jean said Leno was cast because the plot made sense for him due to his knowledge of cars.
When Leno recorded his lines, he pointed out that to be historically accurate, the car his character is buying should have a wooden interior instead of a marble one.
[2] The car Homer finds is a Morgan 3 Wheeler, and Jay Leno arrives at the Simpson house the first time in a 1973 Citroen DS 23 Pallas.