Mulder and Scully learn they aren't the only ones desperately searching for their long-lost son, William; the fate of the world may ride on the outcome.
When an old friend reaches out to Mulder and Scully in a way previously thought impossible, a chilling secret comes to light.
A spate of deaths in which victims are plagued by their own doppelgangers leads Mulder and Scully to a pair of twins playing a dangerous game.
11X04 - The Lost Art Of Forehead Sweat
While exploring the idea of the Mandela Effect, in which groups of people remember an alternate history, Mulder and Scully discover how the X-Files may have originated.
When a pair of teenage girls attack each other, each believing the other to be a monster, Mulder and Scully find that their investigation could possibly lead back to their long-lost son, William.
Mulder and Scully must try to find Skinner, who has recently gone missing. When they find out more about his past, they begin to mistrust the person they thought they knew.
Mulder and Scully find themselves faced with the realities of the ever-developing world of automation and artificial intelligence when they are targeted in a dangerous game of cat and mouse.
Mulder and Scully look into the case of a small boy who was attacked by an animal in Connecticut, while believing darker forces may be to blame.
11X09 - Nothing Lasts Forever
While investigating human organ theft, Mulder and Scully uncover a mysterious cult consumed with macabre rituals.
Mulder and Scully race against time to find William, who is on the run; the Cigarette Smoking Man pushes forward to complete his ultimate plan.