The TARDIS crew lands in the Himalayas of Cathay in 1289, their ship badly damaged, and are picked up by Marco Polo's caravan on its way along the fabled Silk Road to see the Emperor Kublai Khan. The story concerns the Doctor and his companions' attempts to thwart the machinations of Tegana, who attempts to sabotage the caravan along its travels through the Pamir Plateau and across the treacherous Gobi Desert, and ultimately to assassinate Kublai Khan in Peking, at the height of his imperial power.
William Hartnell
Carole Ann Ford
Jacqueline Hill
William Russell
Mark Eden
Derren Nesbitt
Zienia Merton
Martin Miller
Jimmy Gardner
Charles Wade
Philip Voss
Paul Carson
Gábor Baraker
Tutte Lemkow
Claire Davenport
Leslie Bates
Michael Guest
Peter Lawrence
Basil Tang