Description: The Doctor, Amy and Rory arrive in a future Earth where a small group of humans operate a plant extracting highly dangerous chemicals. To minimize the danger to themselves, they create clones made of a plastic-like substance, 'gangers' (short for doppelganger) who do the actual work. While forming their clones however, the Earth is struck by massive solar flare activity that transfer the humans' emotions and memories in addition to their technical abilities. As they all try to deal with what has happened, the gangers are clearly no longer prepared to accept the limited status they previously had and insist on being treated as sentient beings in their own right. As it turns out, others have been affected as well.