Homer embraces the "old person lifestyle" when Grampa and two other octogenarians move into the Simpson home, while Nelson becomes friends with Bart, who defends Nelson's love for hand-me-down underwear.
Homer receives an evil hair transplant in "Hell Toupee." Then, Bart and Lisa get trapped in an Itchy and Scratchy cartoon in "The Terror Of Tiny Toon." Finally, Maggie is revealed to be an alien in "Starship Poopers."
When Homer installs a cell phone tower on his roof to pay for his destruction of the Bill Of Rights, the machinery is put in Lisa's room, forcing her to move in with Bart. When the new living arrangement causes her stress, Homer agrees to try sensory deprivation therapy with her.