In upstate New York, a man has apparently botched a lock-checking duty given to him by his elderly father, the caretaker of an estate; a salamander-like creature attacks both of them. Scully goes on maternity leave, giving Doggett her Apollo 11 medallion gift and thanking him for all his help. Doggett gets a greenhorn new partner named Leyla Harrison, who claims to know all about the X-Files after her work processing Mulder and Scully's travel expenses, and they go to work on the New York case. Though the missing son is suspected in the caretaker's death, Doggett and Harrison soon find traces of some sort of slime at the house. After Doggett realizes something is in the house and tries to capture it with Harrison's help, but she is dragged off instead.
Doggett falls through a trap door in the nearby woods while looking for Harrison, and Skinner and an FBI team begin looking for the missing agents. Scully comes into work despite her pregnancy to try to help locate them, and tells Mulder how the old man died of heart failure but was also blinded by a sort of venom. In a series of subterranean tunnels beneath the estate, the creature partially blinds Doggett and Harrison; Doggett figures the trap that got him was set up to provide meals for the creature. Mulder goes to New York and becomes suspicious of Herman Stites, a biologist and the estate's owner, after finding the medallion in the woods.
A lab assistant tells Scully that the venom breaks down organic material so the creature can easily digest other animals. Mulder spots the creature and tracks it to the house, where we see it transform into Stites. After this trick, Mulder finds the agents, who have discovered the tunnel leading to the house. Harrison realizes that Stites is the creature, and with a little help from Mulder the now fully blinded Doggett shoots him. After the agents are treated at the hospital, Mulder returns the medallion to Doggett, but he says that Harrison deserves it more...even if she's had her fill of the X-Files for now.
Episode Body Count
Arlen Sacks: killed by the salamander creature and found in the woods at the estate.
Dog: or wolf, or other doglike animal. Doggett finds a heavily degraded skull in the estate's tunnels.
Gary Sacks: partially devoured by the creature after it sprays him with venom.
Herman Stites (aka the Salamander Creature): shot by Doggett.
Cumulative Body Count (180/202 episodes, 1/2 movies)
Humans: 2,051Creatures: 129
Grand Total: 2,244