For centuries the Maintainers have worked. With no help from other worlds, they subsist on the food they can grow and that's little enough. But their purpose, their whole life, is to maintain the machines that will one day make their world as habitable as old Earth.
Life used to be hard. Now as crops fail, livestock sicken, and the temperature drops, it's becoming impossible. This year's Winter Season Feast won't be the usual celebration. It's no time for optimism or hope-or to welcome unexpected guests. The Doctor, Amy, and Rory find a society breaking apart-and then the Doctor's old enemies the Ice Warriors make their move. With the cold-hearted threat of invasion, the real battle for survival begins. Or does it? The Doctor suspects that behind everything lies a deadlier, even more chilling danger. - See more at: http://www.blackstonelibrary.com/doctor-who-the-silent-stars-go-by#sthash.SxUEGMUx.dpuf
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