By Terrance Dicks And Malcolm Hulke
When The Doctor, Jamie and Zoe arrive on Earth they find themselves caught up in the terrifying events of World War 1, but new and unexpected horrors await them as they cross landscapes full of enemies and time zones confounded by centuries of wars. At the centre of the mystery stand the Aliens who have captured soldiers from different periods of Earth's history and brainwashed them into fighting each other. When the Doctor learns the terrible purpose of the War Games he has one chance to defeat the Aliens and end the Games.........but to take it means risking recapture by his own people, the all-powerful Timelords who are waiting to bring him to trial and who are capable of ending his very existence.....