Possibly the least annoying Peri story to date, but a bit dull ultimately. ( )

The Fifth Doctor and Peri (unusual choice - obviously only one gap in the established narrative where this can take place) land in what turns out to be an Ice Warrior mausoleum on Mars, at the same time as an Earth probe comes to explore. Needless to say, disaster ensues, but the real monsters turn out to be the humans behind the earth exploration ship. Earnestly done by everyone, with particularly good audio evocation of the Ice Warriors and the Martian landscape. Good but not great. ( )