Available for individual purchase on Apple TV, Amazon Video , and Fandango at Home . Case 08, File 19: Alone - I Want to Review

With Dana Scully on maternity leave, John Doggett is assigned a temporary new partner, Leyla Harrison—a young FBI accountant who is an obsessive fan of Mulder and Scully's previous work. They investigate a series of deaths in upstate New York linked to a biologist, Herman Stites, who has mutated into a venom-spitting reptilian creature.

Through Agent Harrison, the writers playfully address long-standing fan questions and plot holes. For instance, she asks Mulder and Scully how they actually managed to escape Antarctica at the end of the first film, a question they avoid answering.