Arriving at Kublai Khan’s palace, the Doctor loses the TARDIS key to the Khan.
When Marco Polo discovers Ping Cho’s betrayal, the girl runs away.
Marco Polo will not accept that Tegana is plotting against him.
To divert attention from himself, Tegana encourages Marco not to trust the Doctor.
At the Cave of Five Hundred Eyes, Tegana has a secret meeting with a bandit.
The caravan journeys across the dry Gobi desert.
The TARDIS lands in the Himalayas and the Doctor, Barbara, Ian and Susan meet Marco Polo.