Monster movie was a good episode, I loved it, but the episode brought one particular phrase to mind, "jumping the shark." You can't really say that the show has really jumped the shark yet since it was pretty entertaining, I especially enjoyed the allusion to Frankenstein. I was, however, a pretty abnormal episode for such an intensely paranormal TV show.
Also, the entire time I watched, I kept thinking of tricksters even though I already knew the monster was a shapeshifter. It just felt very similar to the second season episode "Tall Tales."