A first Doctor adventure, featuring the Doctor as played by WilliamHartnell and his companions Ben and Polly. Deep in the heart of a hollowed-outmoon the Doctor finds a chilling secret: ten alien corpses, frozen in time atthe moment of their death. They are the empire's most wanted terrorists, andtheir discovery could end a war devastating the galaxy. But is the same forcethat killed them still lurking in the dark? And what are its plans for thepeople...