Doctor Who: The Sun Makers(1977)

Doctor Who: The Sun Makers is a science fiction adventure set in a distant future where humanity has colonised Pluto, warmed by artificial suns after Earth became uninhabitable. The Doctor, Leela, and K9 arrive to find the planet's population brutally exploited by a ruling elite headed by the Collector. In the depths of the Undercity, a band of revolutionaries schemes to topple the oppressive regime. The Doctor must navigate the conflict between the rebels and their oppressors, using cunning and force to fight back against systemic exploitation. The story explores themes of corporate greed and resistance in a hostile alien world.