With so many poor and disappointing episodes littering Season Seven, this back-to-the-basics MOTW episode arrives late in the season like a breath of fresh air. Too bad the series needed a gale-force wind to save itself by this time.
The writing is surprisingly clever for Amann, who is generally considered one of the series' lesser writers. The revelation of the monster's true identity is a surprise, although this surprise is achieved in part by the use of a cheat. Ellen is chased by the monster midway through the episode, which would have been impossible since they share the same physical body, as demonstrated when Ellen notices the stab wound on her back. Now, I realize that only the monster's mirrored reflections are shown as it chases Ellen through the house, but she is carrying her baby and running AWAY from the mirrors, while the reflected monster is shown moving forward with nothing in its arms.
Duchovny easily carries the episode, despite Anderson's relative absence, and he does so with an easy, laconic humor. He seems relaxed and in control, which is a change from the pinched, disjointed performances that he delivers through most of Season Seven. My only gripe is that the writers again rely WAY too much on the use of the telephone to tie Scully into the action, which has become an overused cliche since Darin Morgan introduced this plot device so brilliantly in "Coprophages."