 Back at Scully 's apartment , she runs a background check of Doggett on her computer , learning about his background as a former NYPD detective . She feels sick and leaves the computer , and later on calls her mom , Margaret ( Sheila Larken ) . When she realizes her phone is tapped , she looks outside the window to see if anyone is out there . She angrily calls Doggett to protest him monitoring her phone conversations , which he seems genuinely surprised about . She notices a mysterious man and runs into the hall to pursue him , but meets her landlord Mr. Coeben who tells her that he had seen Mulder . 
