It’s almost impossible to review this episode as a single thing. There was the Monster of the Week episode, which had to do with Garth and the definition of ‘monster’ that SPN has often considered. And there was the last three minutes, which was something completely different.
First, the MotW portion. I’ve liked Garth well enough in the past, but not so much that I was clamoring for his return. I liked him in this episode, though. He’s more interesting as a werewolf – sorry, lycanthrope – than as an unlikely (often comic relief) hunter. Adam Glass let us get to know Garth a bit better, and DJ Qualls gets to invest the character with some emotional vulnerability. His relationship with his new wife comes off as touching, even if it did apparently get very serious very fast (I suppose becoming a werewolf and then having one sniff you out and save your life will move you to the alter pretty quickly).