The 'isolated base under siege' plot is thrashed out once again in this enjoyable story by Justin Richards. Answering a distress call, the Doctor, Rose and Captain Jack find themselves in an abandoned submarine base in northern Russia. However, this being Doctor Who, this is no ordinary search-and-rescue operation, as, with the help of their new allies in the Russian army, they have to deal with deadly blue blob-monsters, bloodthirsty standing stones, and a group of sinister scientists who cannot die...