http://whatculture.com/tv/doctor-who-review-the-husbands-of-river-song-5-reasons-to-love-this-christmas-gift.php

After the bleak midwinter of series nine (http://www.denofgeek.com/tv/the-husbands-of-river-song/38353/doctor-who-the-husbands-of-river-song-review) we find a beacon in the dark.