The Lost Art of Forehead Sweat
S11, E4: Exploring the idea of The Mandela Effect, in which large groups of people remember an alternate history, Mulder and Scully learn how The X-Files themselves may have originated.

S11, E4: Exploring the idea of The Mandela Effect, in which large groups of people remember an alternate history, Mulder and Scully learn how The X-Files themselves may have originated.