The Man Who Grew Too Much/References

Cultural references

 * The episode title is either a reference to the 1922 detective story novel , written by, or to the unrelated suspense films both titled The Man Who Knew Too Much, one released in and the other in , both directed by Alfred Hitchcock.
 * The Shawshank Redemption: The Simpson family are shocked to find Sideshow Bob working as the chief scientist, as to the best of their knowledge, he's still in prison. Bob, seeking to mollify them, says, "No need to worry. I'm still technically shawshanking it at Springfield Penitentiary", using "shawshank" as a slang term referring to being trapped in an undesirable situation (such as prison).
 * A beaker in Sideshow Bob's laboratory is labeled "Acid-Washed Genes", a play on "."

Trivia

 * This is the last appearance of Edna Krabappel. The character is retired since her voice actress, Marcia Wallace, passed away in October 2013.
 * This episode will also be included in the The Simpsons The Complete Seventeenth Season DVD and Blu-ray as the bonus episode.

Continuity

 * Sideshow Bob and Lisa Simpson singing a parody of "", which was sung by Homer and Marge Simpson on Season 21 episode, "Million Dollar Maybe".
 * There are a number of callbacks to previous episodes. Bob's face falls off at one point, a reference to his scheme from "The Bob Next Door". He attempts to kill Bart and Lisa by dropping them off the top of a hydroelectric dam ("Brother from Another Series"). Finally, he gets clocked in the face by a rake he steps on, a gag first seen in "Cape Feare".