Who did contestants have to perform in front of in order to receive their next clue ?
Airdate : 14 August 2012 Banff to Calgary ( Calgary International Airport ) Calgary ( Calgary International Airport ) to Beijing , China ( Beijing Capital International Airport ) Beijing ( Ghost Street [ ] ) Beijing ( Wuzhisheng Foot Reflection Health Center ) Beijing ( Marco Polo Bridge ) Great Wall of China ( Mutianyu ) Beijing ( Forbidden City — Tàimiào Temple ) In this Leg 's Detour , teams had to choose between Waiter or Wheel .