The Companion Chronicles: The Emperor of Eternity

After colliding with a meteor in space, the TARDIS is forced to make an emergency landing on Earth. The place is China around 200 BC, during the reign of the first emperor, Qin.

When the Doctor is taken away to the imperial city, it’s up to Victoria and Jamie to save him. Their friend is now a prisoner of Qin, who intends to extract the secret of eternal life, so that he may rule the world forever...