|Series:||Doctor Who BBC Books|
|LibraryThing:||Title:Genocide ISBN:0-563-40572-4 (Add Book)|
Years after leaving UNIT, Jo Grant receives a plea for help from an old acquaintance. A palaeontological study of the earliest known humans is apparently under threat from a UNIT force led by a captain who does not officially exist. Investigating further, she begins to find herself out of her depth - and out of the twentieth century altogether...