The Sun Makers is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from November 26 to December 17, 1977. In the far future, the planet Pluto is habitable, heated by several miniature suns. However, the heat is available only to the ruling classes, the working population being oppressed by the ruthless, bureaucratic and omnipresent Company.
When the Doctor and Leela arrive, they help to initiate a rebellion from the Undercity, and stop the evil company's plans once and for all. The inhabitants of Pluto in the far future are taxed to desperation, not least the functionary Cordo, who is so overwhelmed by the size of his tax bill that he decides to take his own life by jumping from the roof of one of the vast Megropolis tower blocks. He is interrupted in this pursuit by the arrival of the Doctor and Leela from the TARDIS, who save him from his chosen fate, and discover that false suns have been created around Pluto to provide the ability for some of mankind to live.
However, the Company which owns the suns and all the buildings on Pluto is using its economic stranglehold over mankind to extort ever growing taxes through an extreme form of usury. The Doctor is concerned at this economic and social structure, where each Megropolis is ruled by a taxation Gatherer, and the entire operation on the planet reports to a malevolent Collector. Some citizens have rejected this social order and choose to live in the dark tunnels of the Undercity.
The Doctor, Leela and Cordo venture there and encounter the renegades of the undercity, a vicious bunch of thieves and drop-outs led by the brutal Mandrel. He tells the Doctor that he must use a stolen consume-card to obtain money from a cashpoint or else Leela will be killed.