I like this episode if only for the fact that it explores the possibility that Samantha Mulder may not in fact have been kidnapped by aliens, but had in fact been murdered by a serial killer. It falls down a little bit given that we have seen glimpses of Samantha clones in previous episodes, so where did they come from if not from alien technology?
Still, the story works well, apart from Mulder then taking Roche back to his home and then letting him escape, and of course having to kill him before he would answer in the affirmative or negative to whether he was lying. Yeah the plot was a reasonable one, but the way it was executed made it feel as though there were holes. 3/5