In this edited volume, contributors engage with Barbie (Greta Gerwig, 2023) and Oppenheimer (Christopher Nolan, 2023) through the lens of the Barbenheimer fad, an online and in-person phenomenon — coined by critics and co-opted by fans — that celebrated the counterprogramming of these two divergent films. By framing Barbenheimer as a syndrome, the book revisits this moment in time to consider the elements that constituted the phenomenon on a global scale and to interrogate the logics through which this cultural spectacle may be symptomatic of larger cultural forces and social changes occurring at the time of release.Through the convergence of an interdisciplinary and global range of perspectives, Barbenheimer Syndrome interprets Barbie, Oppenheimer, and Barbenheimer within different cultural contexts to demonstrate both the universal and specific iterations of the phenomenon that struck such a cultural nerve in the summer of 2023.