Mark Eden (who plays Marco Polo) puts such a compelling case for remaking this story on you tube that you really should do it with Edens introduction. The Youtube video has a wonderful introduction to the story where the actor (as old Marco) tells of his adventure finding things that he could not record because no one would believe him. Black stones that burn and a carvan that travels in the sky in which the people who travel in it tell him the future. Your picture Harnois75 is a lovely complement to this lost or discarded firt Doctor Who story made after the pilot series had proven the TV series.
The title of the first episode "The Roof of the World" is a superior title for a film.