Mulder and Scully learn that they aren't the only ones desperately searching for their long-lost son, William. The very fate of the world may depend on it.
Quest roles:
William B. Davis(Cigarette Smoking Man), Chris Owens(Young Cigarette Smoking Man), Annabeth Gish(Monica Reyes), Lauren Ambrose(Agent Einstein), Robbie Amell(Agent Miller), Anjali Jay(Dr. Joyet), Barbara Hershey(Erika Price), Alan C. Peterson(Mr. Y), Jett Klyne(Young Spender), Donald Trump(Self (archive footage) (uncredited)), Michael Flynn(Self (archive footage) (uncredited))