Continuity mistake: General Callahan tells Mulder that the man he saw in his office said his name, but all he said was, "Your time has come, killer". (00:13:10 - 00:17:25)
Visible crew/equipment: After Lieutenant Colonel Stans (who has severe burns all over his body) kills Leonard Trimble, he turns to the camera, where his bathrobe is not fully covering the burn mask he is wearing, exposing a part of his shoulder and the edge of the mask. (00:42:35)
Deliberate mistake: It's completely impossible that the sound of the tape(that sounds like "Fox Maytrink") is in fact "Your time has come,Killer".
Continuity mistake: General Callahan, who is referred to as General Callahan throughout the episode by Mulder, gets called "Lieutenant" Callahan in the last scenes in the steam-room, while lying on the floor.
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