The Federation's grip is tightening and Roj Blake and the crew of the Liberator have nowhere left to hide. As time runs out, old friendships are shattered and new alliances are forged....
In the third century of the second calendar, the galactic Federation, once a beacon of democracy and peace, has become a corrupt tyranny. Freedom and Justice are things of the past....
"In this, the first adventure of his third "incarnation", Doctor Who, Liz Shaw and the Brigadier grapple wth the nightmarish invasion of the Autons...."
Moon base personnel inexplicably vanish and vital weather control equipment is sabotaged. Who is responsible? The Director of the base suspects the time-travellers....