Homer's Phobia
Brother from Another Series
My Sister, My Sitter


  • Sideshow Bob is voiced by Kelsey Grammer, who played Frasier Crane in the TV sitcom Frasier, which was still on the air when this episode first aired. His brother, Cecil Terwilliger, is voiced by David Hyde Pierce, who played Frasier's brother Niles in the show, hence the episode's title.
    • The title is also a reference to the film Brother from Another Planet.
    • When Bart covers Cecil's eyes and asks "Guess who?", Cecil guesses "Maris". Maris was Niles' unseen wife in Frasier.
    • In an ad for the episode, Sideshow Bob while slamming his fist on the table angrily tells Cecil "Mother had high hopes of us becoming prominent psychologists, you know!", a reference to how Bob and Cecil's respective actors' characters in Frasier were both psychiatrists. On a similar note, this marked the first mention of Dame Judith Terwilliger.
    • The episode was written by Ken Keeler, who had been watching a lot of Frasier episodes at the time and had been assigned to write a Sideshow Bob episode and he thought it would be a good idea to mix the two. Pierce was cast as Sideshow Bob's brother, causing Pierce to joke, "Normally, I would not do something like this. But how often do you get a chance to work with an actor like Kelsey Grammer and, more importantly, play his brother?"
  • Krusty's prison concert is a reference to Johnny Cash's famous At Folsom Prison concert and album.
  • At one point in the episode (just before Bob and Cecil discuss wine at his apartment), a parody of one of the title cards from Frasier is shown.
  • Sideshow Bob mentions framing Krusty for armed robbery, attempting to murder Selma Bouvier, rigging the mayoral election, attempting to blow up Springfield, trying to kill Krusty, and plotting to kill Bart Simpson.
  • After Lisa realizes Bart lied about going to Dairy Queen, Bart then promises Lisa they will go on a water slide. Bart ends up coincidentally keeping his promise when he, Lisa, and Sideshow Bob slide down one of the conduits in the dam.
  • Cecil was drawn to resemble David Hyde Pierce, but still look similar to Bob.

Ruth Powers with red hair


  • Yellow-Skinned Krusty

    When the crowd boos after Mayor Quimby defends the choice to release Bob, Ruth Powers has red hair instead of her usual brown hair.
  • Bart was aware about Bob trying to murder him, but he already understood it in Cape Feare.
  • When Bart is praying, his Krusty poster depicts Krusty's face and beard colored yellow instead of white and tan respectively.
  • Bart calls Bob an unstoppable killing machine even though Bart and Lisa have Stopped him every time he has tried to kill anyone(which Bob alludes to while having dinner with Mrs. Krabappel).
  • The space between Bob's fingers is colored red

    While Sideshow Bob holds Lisa back, a piece of his blue shirt above his hand briefly turns red like his tie.
  • The house at the foot of the dam disappears after Bart and Cecil tussle and drop the money, with just Hans Moleman there on the river bed. The following deleted scene has both Moleman and the house.
  • Some of Cecil's hair above Bart's arm is yellow

    As Bart block's Cecil's eyesight, a piece of Cecil's hair is briefly colored yellow, making him look partially bald.
  • There is no way $15 million fits in a briefcase.

Season 7 Season 8 References/Trivia Season 9
Treehouse of Horror VIIYou Only Move TwiceThe Homer They FallBurns, Baby BurnsBart After DarkA Milhouse DividedLisa's Date with DensityHurricane NeddyEl Viaje Misterioso de Nuestro Jomer (The Mysterious Voyage of Homer)The Springfield FilesThe Twisted World of Marge SimpsonMountain of MadnessSimpsoncalifragilisticexpiala-D'oh-ciousThe Itchy & Scratchy & Poochie ShowHomer's PhobiaBrother from Another SeriesMy Sister, My SitterHomer vs. the Eighteenth AmendmentGrade School ConfidentialThe Canine MutinyThe Old Man and the LisaIn Marge We TrustHomer's EnemyThe Simpsons Spin-Off ShowcaseThe Secret War of Lisa Simpson
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