  In this article I will explore some uses of the concept of Boltzmann brains
in comics (Marvel's The Incredible Hercules), an animated sitcom (Futurama) and
a film (Guardians of the Galaxy Vol. 2). Previous similar uses of the concept
(before Boltzmann brains were named as such) will be traced, and potential
influences on these artistic outlets will be analysed. I will also explain how
the concept was used in a novel published in 2018 by Ediciones Ayarmanot in
Buenos Aires (La inevitable resurrecci\'on de los cerebros de Bolzmann, to be
published in English as "Iridio Ennui vs. the Boltzmann brains"). After briefly
reviewing the second law of thermodynamics and the concept of Boltzmann brains,
the paper analyses the four artistic instances in which has been used,
answering two key questions: a) How entities who (in theory) appear in the foam
of interstellar space and suddenly disappear are presented in the fictional
scenario? b) How the plot justifies that Boltzmann brains could exist for a
time long enough to allow them to become viable fictional characters?
