The discovery of two murder victims in the backwoods of West Virginia reveals a long-simmering feud between two families.

Kingsley's men torture Jack to get the computer chip that will prove the Cyprus recording is a fake; Tony continues to process intelligence reports to support a military attack.

Jack continues to look for proof that the Cyprus audiotape is a fake; President Palmer is torn between launching a surprise attack or calling off the operation altogether.

Jack must persuade an unlikely ally to help him take down Peter Kingsley; Marie tells her father she was brainwashed.

Jack attempts to deliver the one person capable of preventing the war; Palmer orders his lawyer to find out everything he can about Peter Kingsley, the man who hired the computer hacker.

Sloane's search for a mole forces Sydney to take a polygraph test; Sydney searches for a device's connection to a 500-year-old sketch.

Sloane is told that Sydney is the SD-6 mole, putting her life in danger; Dixon is shot; Will thinks Kate Jones' pin is the key to some unexpected information.

An employee of Morley Tobacco Co is apparently killed by tobacco beetles. Mulder suspects that the beetles hatched inside his lungs and found their way there through the inhalation of smoke from an experimental cigarette.

A basketball court skirmish leaves Kelly's pal dead; Sipowicz thinks a man is involved in his wife's highway-shooting death.

The squad investigates a deadly hold-up and a drug-related double murder; Medavoy makes a new friend; Irvin bids farewell.