Mulder and Scully search for a killer whose savage murder spree reoccurs every thirty years, where there appears to be no tangible method for the murderer's entrance and escape.
Genre: Crime
Christmas
When Capt. Holt receives death threats, Jake is placed on his protective detail and revels in the chance to boss his boss around.
Thanksgiving
Amy hosts Thanksgiving dinner for the precinct in an effort to get Holt to be her mentor, but Holt and Jake leave early and the rest hate her cooking.
Sal's Pizza
When Jake's favorite pizzeria is burned down and the fire marshal suspects the owner, Jake steps outside his jurisdiction to catch the real arsonist.