The Doctor - William Hartnell
Ian Chesterton - William Russell
Barbara Wright - Jacqueline Hill
Susan - Carole Ann Ford

Marco Polo - Mark Eden
Tegana - Derren Nesbitt
Ping-Cho - Zienia Merton
Man at Lop - Leslie Bates
Chenchu - Jimmy Gardner
Malik - Charles Wade
Acomat - Philip Voss
Mongol Bandit - Michael Guest
Ling-Tau - Paul Carson
Wang-Lo - Gabor Baraker
Kuiju - Tutte Lemkow
Vizier - Peter Lawrence
Kublai Khan - Martin Miller
Office Foreman - Basil Tang
Empress - Claire Davenport

Designer - Barry Newbery
Costumes - Daphne Dare
Make-Up - Ann Ferriggi
Incidental Music - Tristram Cary
Sword Fight Arranged By - Derek Ware
Film Editors - John House, Elmer Davies, Richard Barclay
Studio Lighting - John Treays, Howard King
Studio Sound - Jack Brummitt, Hugh Barker, Derek Martin-Timmins
Production Assistants - Douglas Camfield, Penny Joy
Assistant Floor Manager - Catherine Childs

The TARDIS materialises at the Roof of the World, Central Asia, in 1289. There they meet Marco Polo and his fellow travellers, on their mammoth journey across the Pamir Plateau and through the Gobi desert to Peking. Unfortunately for the Doctor, his Ship proves to be of immense interest to Polo, who sets his mind on presenting it to the mighty Kublai Khan on arrival at his court.

But Polo isn’t the only one with designs on the TARDIS. The war-like Tegana will go to any lengths to steal the magical blue box – lengths which endanger the lives of all the travellers. When the Doctor meets Kublai Khan himself, his precious Ship is his only collateral in a high-stakes game of backgammon – and Khan is a master of the game...