Air Date: May 5, 2007

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The Doctor takes Martha back home to the present day, where they go to the presentation of Professor Lazarus' Genetic Manipulation Device, Read More

The Doctor takes Martha back home to the present day, where they go to the presentation of Professor Lazarus' Genetic Manipulation Device, which reverses the aging process! But something has gone wrong, and the machine has monstrous consequences for the Professor, can the Doctor and Martha save the day? Read Less