 The show centers on FBI special agents who work on cases linked to the paranormal , called X @-@ Files ; this season focuses on the investigations of John Doggett ( Robert Patrick ) , Monica Reyes ( Annabeth Gish ) , and Dana Scully ( Gillian Anderson ) . In this episode , a vicious murderer named Erwin Lukesh , capable of jumping between parallel universes , shoots Doggett using Reyes ' gun . Brad Follmer opens an investigation to figure out the truth . They eventually deduce that Lukesh is the real murderer . 
