This was a highly interesting episode and one that was very well written and performed. I enjoyed the fact that there were two cases going on at the same time, and tht added another dimension to it, in my opinion, although it was obvious which case was being focussed on.
The storyline was amazing, and I thought it was quite a freaky and terrifiying episode, which I enjoyed a lot. The ending was spectacular, and quite shocking and exciting, on my opinion.
Overall, this is an episode that I would highly recommend, and I hope they keep this up in the future!