The Roof of the World 1964
7.5 277 The TARDIS arrives on Earth in the 13th century, where it is claimed by famed explorer Marco Polo as a gift for his employer, Kublai Khan. Polo hopes to finally buy his way out of the Khan's service - but if he succeeds, the Doctor and his friends will never be able to get back to their Ship ever again... (Originally broadcast in seven parts.)
Runtime: 24
Starts: William Hartnell, William Russell, Jacqueline Hill, Carole Ann Ford, Mark Eden
Director: Waris Hussein