This is the first time that Scully fires her gun.
Dana Scully says her FBI ID# is 2317-616. 616 is the area code for Grand Rapids, Michigan, where Gillian Anderson went to high school.
At approximately 30'35", the book that Scully is reading on her bed is The Obstacle Course written by J.F. Freedman, who is also known as Jerrold Freedman, the director.
This is the second episode to feature Deep Throat.