The X-Files 2x21: "The Calusari": As much as the series featured a crazy alien conspiracy arc, there was always an underlying spiritual warfare angle as well. Episodes like this strike right at the heart of that, and even suggest it will become a major plot arc of its own. That never quite materializes. But as far as this episode is concerned, the conflict is real. This is a fairly dark episode overall, a nice contrast to the previous installment. #TheXFiles