The airplane crash sequence at the beginning of the film took several weeks to set up for filming. It was filmed on a vacant block of land at Panorama, south of Adelaide, South Australia. Over 2000 onlookers turned up to watch the spectacular scene being filmed which took only thirty minutes of filming time for the plane to be completely destroyed by fire.
According to 'Antony I Ginnane' on the DVD special feature, this movie was the first Australian theatrical feature film to have a completion bond and a completion guarantor so as to guarantee the completion of the picture.
Four imported actors were originally wanted by the producers to headline this Australian movie. These were Robert Powell), Joseph Cotten, Samantha Eggar and Susan George. The latter two actresses were not cast in the film due to a block by Australian Actor's Equity despite an appeal to the Australian Arbitration Commission. In the end, three non-Australian actors headlined this picture.
On learning of the project, James Herbert, author of the source novel, sent a note to David Hemmings offering his assistance. He never received a reply, and in 1988 dismissed this and the later Deadly Eyes (1982) as "terrible ... absolute rubbish."