Rare zoo animals are being abducted and impregnated in a case that Mulder believes may be linked to an alien conspiracy.
It's the odd couple revisited when Buntz lets `Sid the Snitch' bunk in his apartment to hide from a vengeful ex-con. Hill resents his temporary assignment with a white cop who refused to help a black officer in distress.
The Harts' purchase of an antique auto leaves them open to a wealthy couple's efforts to acquire the car; guest Murray Matheson.
An accident at a chemical warfare research station sends David on a frantic race for an antidote to save his and a friend's life.
