Doctor Who and the Sontaran Experiment

Landing on Earthnow a barren, desolate planetSarah, Harry, and the Doctor are unaware of a large, watching robot. The robot is the work of Styre, a Sontaran warrior, who uses all humans landing here for his experimental programs. What has happened to the other space explorers who have come here? Why is Styre so interested in Earth, and in brutally torturing humans, including Sarah Jane? Will the Doctor be able to prevent an invasion, and save both Earth and his companions?

Published 1984

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