Homer's Barbershop Quartet/References

Trivia and Cultural References

 * Principal Skinner recognizes an old prison helmet of his from Vietnam with the number '24601'; this is the number tattoed on Jean Valjean in Les Misérables, and his only identification. The same number is also Sideshow Bob's prison number in Black Widower.
 * This was David Crosby's second appearance on the show, and the second appearance of a Beatle on the show.
 * The famous Disneyland barbershop quartet, the Dapper Dans, provided the singing voices for the Be Sharps.
 * The record that Comic Book Guy had at the swap meet, "Melvin and the Squirrels" is a spoof of Alvin and the Chipmunks.
 * Apu's new name (de Beaumarchais) is French for 'of the good market', an obscure reference to the Kwik-E-Mart.
 * The Take One couch gag shows The Simpsons running into each other and shattering into pieces; this gag was reused in $pringfield and Lady Bouvier's Lover. The Take Two couch gag shows The Simpsons running into each other again and melding into a blob; this gag was reused in Bart Gets Famous.  The Take Three couch gag shows The Simpsons once again colliding; this time they explode.  The Take Three gag was reused in Homer the Vigilante and Secrets of a Successful Marriage.  In syndication, only the Take One gag is used.
 * The song "Baby on Board" was first heard in Ishtar, the flop 1987 motion picture comedy starring Dustin Hoffman and Warren Beatty.
 * A deleted scene of this episode showed Skinner going back to his mother. She asks him if he was with a woman, he says no, then she asks for a bath, followed by mad laughing and a close-up of their Psycho-parody house. This is the first time Skinner would be involved in a knock-off joke based on the movie Psycho.
 * This is the first episode to be dedicated in memory of someone.
 * The cover of "Bigger Than Jesus", The Be-Sharps second album, features the group walking on water. It is a direct parody of the art on The Beatles album Abbey Road.
 * In The Simpsons: Hit and Run, one of Apu's 3 costumes is his quartet outfit from this episode.