"Jeopardy!" – Alex Trebek's comment that Marge owed the show $5,200 (based on her negative $5,200 score, which cannot happen in real life on the show) is a spoof of criticism concerning Trebek's sometimes stern rules enforcement of shows he hosted, particularly during the early years of "Jeopardy!" Also a likely reference to Alex Trebek's early years hosting was that he is portrayed on The Simpsons with a mustache. At the time of the episode's airing and since then, Alex Trebek shaved off his mustache for a clean-shaven look.
It's a Wonderful Life - the scene where everyone rallies around to support the Simpsons is reminiscent of the last scene of the classic holiday movie. The scene where George Bailey tells his child to stop playing the piano is also spoofed by Homer telling Lisa to stop playing the piano.