Apparently, when producer Jeremy Thomas and director Philippe Mora went to first meet actor Dennis Hopper at his home in New Mexico, Hopper greeted them at the airport with a gun in his hand.
Dan Morgan (real name John Fuller) was born in New South Wales, Australia. While it is believed his mother was Irish, it is unlikely that he spoke with a heavy Irish accent. More likely he would have adopted the developing local accent.
In a farmhouse, a picture of a Tasmanian tiger or Thylacine is pointed out as being that of an extinct animal. The Thylacine did not become extinct until the 1930s.