Aussie Bob is played by a Kiwi, and Kiwi Terry is played by an Aussie.
The "Golden Triangle" that Terry references is (geographically) the area where the borders of Thailand, Laos, and Myanmar meet at the Ruak and Mekong rivers. It is regarded as the world's second largest opium produce.
As of 2021, there still remains a $200,000 (AUD) reward on the NSW police website for information that leads to the discovery of Donald Mackay's body.
Terry Clark's second wife, Norma Fleet, died in mysterious circumstances.
While she is not referenced, Maria Muhary was actually Terry Clark's third wife. Clark's first wife, Sally, with whom he had three children, left Clark after after, according to Sally, was "extremely abusive". Clark was sent to prison for assaulting Sally, where he would later meet his second wife.