In the climactic scene, the play breaks completely from naturalism by having the character of Mr. Kinderland return from the dead, as a ghost or vision, but this is framed as a symptom of the killer's madness. Additionally, the song Hush, Little Baby is repeated many times in the story, often when the characters are reflecting on their childhood, to create an eerie effect. At first, there is an onstage source for the song, but over time, it creeps in without explanation and plays for the last time when the killer is confronted.
