 The title of the episode is a reference to the novella Heart of Darkness by Joseph Conrad . The third act of the episode is largely a pastiche of Alfred Hitchcock 's Rear Window . As in the film , a wheelchair @-@ using Bart witnesses an apparent murder through his telescope , with musical cues from the film also being used . James Stewart 's character L. B. " Jeff " Jefferies appears twice , caricatured as he looks in the film . Also , the pictures on the wall of Jeff 's room are a racing car accident and a plane , the same as in Rear Window . The barn building scene with the onlooking Amish man is a reference to Peter Weir 's film Witness . The Itchy & Scratchy episode 's title is a reference to The Planet of the Apes , with the mutants being a reference to the Star Trek episode " The Menagerie " , as well as Beneath the Planet of the Apes . Itchy 's sealing of Scratchy behind a brick wall alludes to Edgar Allan Poe 's short story The Cask of <unk> . At the end of the episode Martin sings Frank Sinatra 's " Summer Wind " . Springfield 's wax museum features models of The Beatles and the cast of M * A * S * H , and Bart plays <unk> on his own . The pool dance scene sees Lisa in a role like those of Esther Williams , while Bart 's play has similar elements of the works of Anton Chekhov . Dr. Hibbert is watching Jay Leno in his living room . 
