If I remember right, I think that was the VERY last regular monster of the week series episode Mulder was in.  I rewatched the whole series a year ago and Mulder disappears after that one.  It was actually a VERY decent episode.  

If I remember right, I think that was the VERY last regular monster of the week series episode Mulder was in.  I rewatched the whole series a year ago and Mulder disappears after that one.  It was actually a VERY decent episode.