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.

Jon Pertwee
as The Doctor

Katy Manning
as Jo Grant

Nicholas Courtney
as Brigadier Lethbridge-Stewart

Roger Delgado
as The Master

Nicholas Pennell
as Winton

John Ringham
as Ashe

David Webb
as Leeson

Sheila Grant
as Jane Leeson

Roy Skelton
as Norton

Helen Worth
as Mary Ashe
CinemaSerf
The "Brigadier" (Nicholas Courtney) walks into the lab just as the TARDIS takes an unexpected trip that sees the "Doctor" (Jon Pertwee) and "Jo" (Katy Manning) travel forward in time to the remote planet "Uxarieus" that's only recently been colonised by "Ashe" (John Ringham) and his team. No sooner ...