While investigating a videotape of an alleged alien autopsy, the agents uncover what seems to be tangible proof of the government’s contact with extraterrestrials.
Mulder finds himself trapped on a speeding train with a government assassin, a ticking time bomb and a deadly virus.
Things get uncomfortably close between Rachel and Logan Sanders. Also, Harvey and Mike agree to a temporary ceasefire, and Mike learns just how ruthless his new business partner really is.
Scully learns new details about her sister's murder as Mulder pursues the shapeless alien entity inside Krycek's body.
When a deadly, viscous organism is discovered inside a strange rock, the agents race to determine the rock's origin.
