So the pre-air reviews of this episode have pretty much all been
really positive. Looks to be a great episode although some are saying that it could be divisive, as some might not 'get' it. I'll post a couple here if anyone's interested.
http://www.doctorwhotv.co.uk/face-th...down-78039.htm
http://www.denofgeek.com/tv/doctor-w...er-free-review
http://www.radiotimes.com/episode/dv...11-heaven-sent