A word of warning. When out in the wilderness please avoid wearing large furry coats lest you get mistaken for a dangerous Yeti. This week Paddy and Tricia discuss the latest adventure of the TARDIS crew when they land at an isolated Tibetan monastery which is under siege from a horde of mythological creatures, guided by a malevolent unseen power, Just who or what is this power and what does it have to do with The Abominable Snowmen.