Season four sprinkles single mythology-related episodes all throughout; more so than any other season. It becomes a bit overwhelming at times, but I like it. Demons is another such episode. This episode delves into Mulder's memories regarding his sister's abduction. The story is tense and exciting from start to finish as Mulder and Scully work to find out how Mulder was involved in the deaths of two strangers and why he can't remember anything about the last two days. Mulder experiences all of these flashbacks from his childhood involving his family and the cigarette smoking man. He then goes and confronts his mom about an affair between her and the cigarette smoking man. I found it interesting that Mulder won't look his mother in the eye until he is alone in the room with her. I don't know why. The one cheesy part of the episode is when Mulder and Scully find Mulder's car and it has "thick" dust on it from two days of non-use. No way a car is going to have that much dust on it from just two days. Unnecessary scene. They went with Chris Owens as the younger cigarette smoking man, as he had played that role in "Musings of a Cigarette Smoking Man". However, they got a different actor to play the young Fox Mulder, one that has more similarities to Chris Owens, perhaps to suggest ambiguity to Mulder's paternity. One of the final scenes mirrors a scene from "Zero Sum" where Skinner fired shots right past the smoking man's head. It's a very tense scene. But, as Scully says, Mulder was given a powerful hallucinogen, and we don't know how accurate his memories are that we see during this episode. So, once again, Demons leaves us with the classic x-files doubt of what really is the truth.