A killer with X ray vision is on the loose...
Worcester, Massachusetts: Carlton, an estate agent, leaves a frantic message on an answering machine. Rushing in to the local police station, he tells the police that someone is trying to kill him. They put him in a cell, and are surprised to watch his head explode against the door.
Scully and Doggett are called in by Captain Triguero to investigate. Carlton was shot with a 9mm bullet - that passed through the police station roof. But how did the killer see through the building to aim?
At AAA-1 Surekill Extermination, Tammi Payton is picking up the evening's messages - she erases Carlton's frantic message. When the boss, Dwight Cooper and his twin brother Randall arrive, they discuss the death - Randall killed Carlton because he was defrauding the company, but he can't trace the cash.
Scully and Doggett visit Carlton's work, finding invoices from the extermination company. In one room, the wall is full of bullet holes, as if someone were shooting through the wall.
Later, Dwight meets some drug dealers inside a derelict building, and shoots them... with his fingers. Randall was behind a wall, which is now full of bullet holes. Investigating the incident, Scully concludes the killer must have X ray vision - there have been several similar cases recently.
Visiting the Exterminators, Scully and Doggett show Dwight their evidence; the invoices they found in Carlton's office - although his eyesight is too poor to read them; some fabric found at the police station, that bears traces of a chemical used in extermination; the fact that Carlton's last call was to Dwight's office. Dwight is puzzled.
Meanwhile, Tammi is at home, having bought a bus ticket to Montana - unaware that Randall is spying on her in the shower. The following morning she goes to work early, and makes for a cash box. Dwight and Randall catch her, just as Scully, Doggett and the police arrive. It transpires that the cash box is empty - which surprises Tammi.
Dwight, Randall and Tammi are taken in for questioning. The Agents suspect that Carlton was selling on drugs stolen from the dealers by Dwight, but can't figure out why Carlton was killed. Tammi had made eight late-night calls to Carlton in the past week - perhaps Randall murdered Carlton from jealousy?
Tammi approaches Randall - he removed the money and ledger from the cash box to protect her from Dwight. She's been skimming cash, but still needs Randall's help. She goes to retrieve the cash from the bank. Dwight is there before her, and forces her back to the AAA-1 offices at gunpoint.
She tells him that Carlton was blackmailing her, having found out about her defrauding the company. When Randall arrives, Dwight gives him the gun and tells him to shoot Tammi. Dwight leaves the room as Randall takes aim... and shoots through the wall, killing Dwight.
Randall is arrested, but back at the police station uses his powers to view computer screens through the walls - Tammi is now a wanted fugitive, and he no longer feels so alone.