When the Master steals the Time Lords' secret file on the Doomsday Weapon, they grant the Doctor a temporary reprieve from his exile on Earth to deal with the crisis. He and Jo arrive on the planet Uxarieus and become enmeshed in a struggle between an agrarian colony and a powerful mining corporation.
The Doctor
Jo Grant
Brigadier Lethbridge-Stewart
The Master
Winton
Ashe
Leeson
Jane Leeson
Norton
Mary Ashe
Martin
Mrs. Martin
Robot
Primitive / Voice / Long / Colonist
Time Lord
Time Lord
Time Lord
Caldwell
Captain Dent
Morgan
Holden
Alien
Alec Leeson
The Guardian
Alien Priest
