Trivia: Sideshow Bob's passion for singing is a dimension to the character that was uniquely Kelsey Grammer's, stemming from his own personal history of singing standards on the set of Cheers.
Cubs FanWhen You Dish Upon a Star - S10-E5
Trivia: At the end, Homer prank calls the "old lady from Titanic." This is Gloria Stuart, who tied with Kim Basinger (one of the main guest stars of the episode) for the SAG Award for Best Supporting Actress.
Trivia: When the episode was written, the show's writers were unaware there was a real George Bush, Jr (e.g. George W. Bush). The intended joke was that, in one of his usual moments of idiocy, Homer had invented a fake son.
Cubs FanOrange Is the New Yellow - S27-E22
Trivia: The license plate of Chief Wiggum's police car reads, "#1DOOFUS."
Scott215Three Gays of the Condo - S14-E17
Trivia: The voice Hank Azaria uses for Grady is the same voice he used for his character in "The Birdcage."
Phaneron
Four Great Women and a Manicure - S20-E20
Trivia: Bart does not appear at all in this episode.
Casual PersonKrusty Gets Kancelled - S4-E22
Trivia: The scene where Bette Midler sings to Krusty is an allusion to Johnny Carson's penultimate episode as host of The Tonight Show where Midler was his final guest and sang to him.
Phaneron
Trivia: The property next to the Simpson house is very versatile. It has been Flanders house (both sides), a cemetery, the parking lot to the nuclear plant and a vacant lot.
Trivia: During the couch gag, the Simpsons run through different places (as spoofs of different TV shows). One of the places they run through is the bar from Cheers. When they all sit down, Sideshow Bob walks through the door. Kelsey Grammer does the voice of Sideshow Bob, and starred as Doctor Frasier Crane in Cheers.
Casual PersonThe Old Man and the Key - S13-E13
Trivia: When Grampa, Crazy Old Man and Jasper are about to race Snake, and his girlfriend is there, the girlfriend is Gloria from "Hunka Hunka Burns in Love."
kane raggettTrivia: In this episode the Simpsons are labeled finally as a "northern Kentucky family"; this was quickly enough dismissed as a red herring for various reasons. To further mystify, however, if you turn on the English subtitles on the episode, they say "southern Missouri family".
The Old Blue Mayor She Ain't What She Used To Be - S29-E6
Trivia: When a man falls into the Springfield Cactus Plant after sliding down a wire to escape the panicked crowd, he yells a Wilhelm scream.
Trivia: In this episode, Wolfcastle says "Real acid?" and starts to have doubts about filming the scene. In The Terminator, Arnie (who Wolfcastle is a parody of) said the exact same thing when he learned that the crew were going to pour acid on his clothing for a smoke effect.
Covercraft - S26-E8
Trivia: On the wall in Apu's changing room is a picture of the Be Sharps, the barbershop quartet consisting of Homer, Apu, Seymour Skinner and Chief Wiggum that was featured in the Season 5 episode Homer's Barbershop Quartet.
Tanngrisnir