Sorry for not posting a review the past two days. I'll try to catch up as best as possible.
Before watching the episode, I didn't remember much about the episode other than that it introduced Krycek and X. The concept behind the episode is interesting: A military experiment forced a squad to not sleep, which led them to massacre a village. One particularly disgruntled member, Augustus Cole, played by Tony Todd, takes to retribution, first targeting Dr. Grissom and then Dr. Girardi. He has a rather unusual ability to project thoughts and ideas into others, killing them through their mind. However, nothing sticks out and the major issues of government experiments and the ability aren't explored deeply.
The two new characters, X and Krycek, get a somewhat stunted introduction. Krycek doesn't do much, but is revealed as reporting to CSM in the end. X meets very briefly with Mulder to pass on information and tells him up front that he is not like Deep Throat and will not put his life on the line.
Scully helps Mulder in the case and shows a little jealousy over Mulder's new partner. Krycek sees the unique bond between her and Mulder, viewing it as a problem and tells this to CSM, who replies "Every problem has a solution."
Score: 8.8/10