简介：While Mulder remains aboard the passenger train he suspects is harboring an extraterrestrial prisoner, Scully is directed to a disease research facility nestled in Perkey, West Virginia. There, she is informed that ordinary individuals have been subjected to experimental tests. Amidst a web of deceit and uncertainty, Mulder is compelled to prevent the train — or, at the very least, its onboard bomb — from proceeding further.