Tegana was a 13th century Mongol war lord. He posed as a peace emissary from Noghai to
During their travels, Tegana tried to make Polo suspicious of the Doctor’s group. At the same time, however, Tegana was making arrangements for a group of bandits to attack Polo’s camp. Each time, he was defeated, but Polo never suspected him and refused to believe Ping-Cho and Susan when they accused him of helping to kidnap Barbara.
Tegana also tried to steal the TARDIS for Noghai, but it was eventually brought to Peking.