Doctor Who & Mister Drew: "Marco Polo"
The Doctor and his companions wind up at the top of the Himalayas, "The Roof of the World", where they discover the TARDIS has lost all power. They are saved from a frozen death by traveller Marco Polo and his caravan. He is intrigued though by the Doctor's caravan, the TARDIS, and seizes it in the name of Kublai Khan in the hopes he will be released from his service.
The story is one of the first we will be covering that doesn't exist in a moving image form. It was reconstructed using audio and photos from the episode. Despite this, this story has to be one of the best of William Hartnell's era and deserves a careful viewing, even by the casual fan.
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Check out episode one by visiting Daily Motion.