Episode 100: Red catches the attention of a master manipulator (People v O.J.‘s Nathan Lane) while in search of a legendary treasure.
Mulder and Scully investigate a series of deaths in which the victims were plagued by their own doppelgängers.
Luke goes missing after a night out; Alex’s professor (You’re the Worst‘s Chris Geere) gives Haley a piece of his mind after she rudely disrupts his class.
Atwater gets kidnapped at the home of a convicted felon; Mekhi Phifer (ER) and Jesse Garcia (From Dusk Till Dawn: The Series) guest-star.