“Marco Polo”
The Roof of the World / The Singing Sands / Five Hundred Eyes / The Wall of Lies / Rider from Shang-Tu / Mighty Kublai Khan / Assassin at Peking.You know, it occurs to me that, just maybe, not everyone reading this has perfect recall of of old TV serials broadcast almost 50 years ago (and which, in many cases, exist only in fragmentary sources). So perhaps I’d better explain who’s who as I go along.
So, our heroes find themselves on a journey across Cathay in 1289.
Tegana, envoy from the Mongol warlord Noghai to the court of Kublai Khan. He’s up to no good.
Marco Polo, in the service of Kublai Khan, but hoping to persuade the emperor to allow him to return to Venice by bribing him with the gift of the Doctor’s “flying caravan”.
Ping-Cho, being taken by Marco to her arranged marriage to an elderly court official.

Bearers and pack animals from Marco’s caravan.
Acomat, agent of Noghai in Tun-Huang, with Mongol bandits, who attack Marco’s caravan.

More Mongol bandits and guards.

At Tun-Huang:
Chenchu, way station attendant, and
Malik, Acomat’s elderly henchman.
Ling-Tau, dispatch rider from the emperor. At Cheng-Ting:
Wang Lo, manager of the way station and
Kuiju, a crook who defrauds Ping-Cho and assists Tegana.

At the imperial court: a vizier and palace guards.
Kublai Khan, war lord of war lords, mighty and fearful in his strength, ruler of Asia, India, Cathay and other territories, Master of the World, martyr to rheumatism and gout.
Dwarf, holding the backgammon board on which the Doctor and Kublai Khan gamble for possession of the TARDIS.
The
Empress, who has some bad news for Ping-Cho.