Walter, Broyles and Astrid race to save Peter and Olivia when they are exposed to a life-threatening virus.
When a deadly, viscous organism is discovered inside a strange rock, the agents race to determine the rock's origin.
When several black men turn up dead – their bodies completely devoid of skin pigmentation – Mulder and Scully hunt down an African killer who must consume human hormones to survive.
Special Agents Mulder and Scully investigate a suspicious plane crash that killed a well-known alien abductee.
To save his dying mother, Mulder must protect the extraterrestrial healer, Jeremiah Smith, from a ruthless alien bounty hunter.