The Rebel Flesh

A solar storm sweeps the TARDIS to a factory on an island on 22nd century Earth. There the Doctor discovers that the local workforce uses a substance called Flesh to make doppelgangers of themselves, Gangers, as remote-control labor tools. However, when a second storm imbues the Gangers with life, the Doctor must try and resolve the differences between the two groups before they wipe each other out.