The Mermin-Peres magic square is a simple game which is at the heart of many results in quantum cryptography and quantum complexity theory. In this episode, we trace the origin of the Mermin-Peres square back to two short papers by N. David Mermin and Asher Peres. Mermin's paper: https://doi.org/10.1103/PhysRevLett.65.3373 Peres' paper: https://doi.org/10.1016/0375-9601(90)90172-K Hosts: Vincent Russo (vprusso.github.io), William Slofstra (elliptic.space), Henry Yuen (henryyuen.net) Theme music is WLIIAW by Vincent Russo