Sacha Dhawan? Diane Morgan? Dan Starkey? Cyrill Babcock from Benidorm!? What a cast!

This had a rather slow start, but really picked up from the 2nd half onwards. The angels work well on audio despite the obvious limitations. The imagery at the end where they're climbing the walls of the Sistine Chapel was terrifying! Very eery in parts, and the story introduces some really interesting concepts with the cult, would love that to get expanded upon someday.