Visible crew/equipment: In an early scene with Scully and Skinner talking in the hallway, there is a crew member obviously hiding behind a trash can. (00:07:10)
Visible crew/equipment: In the final scene of the episode, when the camera goes up, its shadow can be seen on the left side of the screen. (00:42:15)
Answer: As he stated many times throughout the series, Mulder needed Scully to be sober and skeptical. Whenever Scully's skepticism wavered and she started questioning her own rationality, Mulder would try to restore her sense of skepticism, because he needed her to be clear-thinking.
Charles Austin Miller