Doctor Who: Vengeance on Varos

Seeking the rare mineral Zeiton-7 to repair his TARDIS, the Doctor arrives on Varos, a world where political prisoners and their guards are all subjected to sadistic tortures and executions which the colony's inhabitants view and vote on through interactive television. Accused of being alien infiltrators helping the colony's rebel factions, the Doctor and Peri find themselves the latest unwilling subjects in this most extreme form of reality TV.