One of the best Homer and Lisa centered episodes, If anyone forgets how likable and sympathetic Lisa used to be, they should watch this episode. After Homer kicks Lisa out of her room so that a cell phone company can build a cell tower on their house (as payment for when Homer ruined the Bill of Rights) , Lisa grows more stressful and eventually has to go to the doctor. Dr. Hibbert suggests Lisa try some new age solutions rather than antacids. Homer and Lisa go into a hippie store and decide to try some sensory deprivation tanks. The result is Lisa seeing things from other character's point of view such as the cat and ultimately her Dad when he takes her to events he doesn't enjoy but only goes to spend time with Lisa. Homer's tank goes on a hilarious adventure from being repo'ed to falling out of a truck, being buried, falling into a sewer, and eventually ending back at the hippie shop. I really miss episodes like these where Lisa isn't just nagging or being a preachy know-it-all. I like how she develops as a character, learning to see the world through other people's perspectives, including that of her father. It's a touching episode with a good amount of humor and one of the best Lisa focused episodes.