Director-General Xian Yoh was a character from the Captain Scarlet and the Mysterons episode Winged Assassin. He was the Director-General of the United Asian Empire. A Mysteron threat was made against his life, and was taken into protection by Spectrum. An assassin was stopped by Captain Grey, but the Mysterons finally succeeded when a retrometabolized DT-19 airliner crashed into his plane, killing him.
Xian Yoh was voiced by Jeremy Wilkin.
- Unsurprisingly, Xian Yoh's puppet was the same one used for his doppelgänger in the fake Spectrum motorcade. They even shared a voice actor, Jeremy Wilkin. The puppet also appears as the Arab in Point 783 and the Waiter in The Inquisition.
- In Joe 90 it appears as the General in Three's A Crowd, Miller in Double Agent and General Kwan in Mission X-41.