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Doctor Who Season 9 Episode 8 - The Zygon Inversion (2)
The future of planet Earth is sealed in a box in Unitâ€™s back archive, and only the Doctor knows whatâ€™s inside. With Unit under Zygon control, and Clara lost, the Doctor and Osgood find themselves fugitives in a London where no one can be trusted â€“ but the wily old Time Lord knows there is one last hope for peace. Because that box in the black archive isnâ€™t any old box. Itâ€™s an Osgood Box!
Air Date: 7 Nov 2015