Amusing enough. Although the brothers Winchester have time traveled quite a bit throughout the series and have had their share of bizarre experiences (particularly of the meta-mold) I enjoyed this hour for it was; a pleasant diversion with some hilarious lines and intriguing ideas. I particularly enjoyed the way Dean got in touch with Sam through different centuries via a carving in the wall.
However, I think it’s about time we got back into the season’s main arc concerning the Leviathans. Standalones and monster-of-the-week episodes are occasionally fine, but I much prefer the gripping, serialized drama our protagonists usually find themselves in. Hopefully that will return next week with the ominous and haunting ending that we were left with in this episode.