I am loving the surreal nature and creativity of these McCoy stories, I must admit. The atmosphere, music and overall creep factor in this one is as good as you'll get in a Who story. Love the meta ideas in here too regarding the show itself too. It's not all wrapped up neatly in a bow at the end with the Gods of Ragnorak stuff not really being explained and over with quite quickly, that's probably my only criticism but this is really good.