Check out an all-new “The X-Files” trailer. The series airs Wednesdays on FOX. In tonight’s all-new episode, “The Lost Art of Forehead Sweat,” written and directed by Darin Morgan, the idea of The Mandela Effect, in which large groups of people remember an alternate history, is eXplored as Mulder (David Duchovny) and Scully (Gillian Anderson) find out how The X-Files themselves may have originated.