Crashing inside a newly formed planet, the Doctor and others find it inhabited by a slave labor mining society, where rocks are harvested for their radioactive energy and human life has little value. With a population controlled by deliberate cave-ins, poison gas, and periodic sacrifices to an Oracle, the miners, called Trogs, are also descendants from Minyos, and who desperately desire freedom. Written by
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All four episodes of the serial ran short of their allotted running time, forcing the use of extended and repeated shots for padding. This episode in particular was so much in need of padding that the reprise was much longer than usual. See more
The quest is the quest.