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1.04 - Marco Polo

All seven episodes of this story, which sees the Doctor and his companions meet explorer Marco Polo in 13th-century China, are lost. However, DVD box set The Beginning, which includes the first three Doctor Who stories, also features a condensed 30-minute form of 'Marco Polo' as an extra.

This version of the story consists of 'telesnaps' (photographs taken off-screen on original transmission) set to an edited audio track. The entire story exists as an audio recording, which has also been released in full on CD.

How to watch Doctor Who's 97 missing episodes

Lost in time and space... how can you enjoy these classics?

From Digital Spy