During one of his daydreams, in a nod to "Show Boat"'s Gaylord Ravenal, Mitty imagines himself as Gaylord Mitty, a riverboat gambler. During one of the songs, Mitty utters the line "Tote dat barge, lift dat veil", a deliberate misquote from the song "Ol' Man River".
While talking about the murder and the woman Walter was with, a cop says "And you say the woman was in green?" Then he says "I know; this is a case for Scotland Yard" . In "The Woman in Green", Scotland Yard looks for a woman they suspect of killing someone.