Far in the distant future, Earth has become uninhabitable, forcing Mankind to colonise first Mars and then Pluto. No longer the coldest planet in the solar system, Pluto is now warmed by artificial suns. The Doctor, Leela and K9 arrive to discover the exploitation of the Megropolis people by the ruling elite, lead by the Collector. Deep in the Undercity, a small group of revolutionaries plot to overthrow the company and the Doctor is forced to fight the oppression of the people using Fire against Fire...
Tom Baker
as The Doctor
Louise Jameson
as Leela
John Leeson
as K9 Mk. I (voice)
Henry Woolf
as The Collector
Richard Leech
as Gatherer Hade
Jonina Scott
as Marn
Roy Macready
as Cordo
David Rowlands
as Bisham
William Simons
as Mandrel
Adrienne Burgess
as Veet
Michael Keating
as Goudry
Carole Hopkin
as Nurse
