Synopsis by Mark Deming
Having agreed in advance to take his kids out for a "special Saturday," Homer Simpson (voice of Dan Castellaneta) grudgingly escorts Lisa (voice of Yeardley Smith) and Bart (voice of Nancy Cartwright) to a road-show exhibition from the Smithsonian Institution. Homer manages to destroy the original copy of the Bill of Rights touring with the show, and OmniTouch, the cellular phone service sponsoring the event, agrees to cancel his debt if they can put a signal tower on his roof, and move the broadcast setup inside the house. The gear ends up in Lisa's room, and Homer informs her she'll be bunking with Bart for the time being. Losing her room and constant fighting with Bart send Lisa's stress level through the roof, and soon her stomach is paying the price; Homer takes her to see the ever-jovial Dr. Hibbert (voice of Harry Shearer), who suggests that alternative means of therapy might be in order. While Homer pooh-poohs the idea at first, eventually Lisa persuades him to join her at a New Age healing center, where they both try the sensory isolation tanks. Lisa's out-of-body experiences help her feel less distant from her father, while Homer's tank somehow ends up on the beach. "Make Room For Lisa" first aired on February 28, 1999.