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. Written by
Did You Know?
Sarah Smart had no idea which of the Two Jennifers she was playing at times. See more
You gave them this. You poured in your personalities, emotions, traits, memories, secrets, everything. You gave them your lives. Human lives are amazing. Are you surprised they walked off with them?
Doctor Who Theme
Written by Ron Grainer
Arranged by Murray Gold
Performed by BBC National Orchestra of Wales See more