在这部双面人顾先生悬疑/惊悚片中,1970年1月占士美臣(James Mason) 來香港取景拍攝電影 《雙面人顧先生》 The Yin and the Yang of Mr. Go (aka The Third Eye) ，邀請導演胡金銓客串飾演日本商人一角，片酬高達十六萬港元，打破港台兩地演員片酬紀錄，無人可望其项背。
此外，占士美臣(James Mason)、保格斯米利迪夫(Burgess Meredith)和年輕的傑夫布里吉(Jeff Bridges)，穿起唐裝做戲，一貫的荷李活式東方情調了。
Buddha has the power to change the nature of a person into their opposite. He uses this power only when the world is in danger. When a villain obtains plans that could be used for peace or war, Buddha turns him into a good guy. Now what?
