Season 6, Episode 1: Bart of Darkness
During a major heatwave, Bart and Lisa beg Homer and Marge to get a swimming pool at home. When they finally relent, the swimming pool has the unintended effect of making Bart and Lisa the two most popular kids at Springfield Elementary. But after Bart breaks his leg, he’s forced to watch Lisa and all the other kids have fun in the pool from his bedroom window, which includes an homage to the elaborate Busby Berkeley-directed musical numbers from various Esther Williams movies, featuring Lisa as a stand-in for Esther.
