Air Date: May 21, 2011

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The TARDIS arrives in Earth's future at a factory where human doppelgangers, "Gangers," are used as manual labourers. A solar Read More

The TARDIS arrives in Earth's future at a factory where human doppelgangers, "Gangers," are used as manual labourers. A solar tsunami frees the Gangers, and the original people they are based on must decide whether to accept their counterparts or eliminate them. Read Less