A duplicate of Ace was made by the Daleks to infiltrate the library on Kar-Charrat. It was sent into the library, where it shut down the defences for the Daleks to enter. Because the Kar-Charratans could invade the Daleks casing, they sent it out to find the Doctor in the rainforest. It broke Cataloguer Prink's neck, but he managed to destroy it. (AUDIO: The Genocide Machine)

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