Two Emperors, and two halves of the Roman Empire, clash inside a freshly-exploded crater in 312AD – as the Doctor, Alice and Jones attempt to solve the mystery of the horror that rode down to Earth aboard the titanic meteor that caused it! Plus a surprise villain that threatens them all – one so secret there's no way we're mentioning them here! Doctor Who, the Daleks, the Cybermen, TARDIS and all other characters and logos are trade marks of the BBC and are used under licence unless otherwise indicated.
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