Final answer:
The least likely element of Aristotle's elements of drama to be found in reality TV shows is 'music', since these shows do not usually incorporate music as part of their narrative structure.
Step-by-step explanation:
The element of Aristotle's elements of drama most likely not present in reality TV shows is 'music'. While reality TV shows often include many elements such as spectacle, theme, and plot, they do not typically include music as a formal element in the narrative structure. In Aristotle's analysis within The Poetics, he identifies six elements of drama: Plot, Character, Diction, Thought, Spectacle, and Song. Song, which can be understood as the musical dimension within a theatrical production, is closely related to the Greek tradition of incorporating music into their tragedies, which is quite different from what is experienced in reality TV shows today.