Aired in Australia on 31 July 1986.
Given an American release date of 24 November 1985.
Filmed in Victoria, including The Grampians, Buchan Caves, and Bairnsdale.
According to the Crawford Productions website,
Shot on location in the Bainsdale area.
Some cave scenes were shot in the Buchan Caves. The fortress cave was constructed after failing to find a satisfactory location. It was built in the Grampians countryside - using 27 tonnes of scaffolding, 5 trucks of concrete, 3,500 metres of chicken wire, countless wooden boxes, 2,000 metres of hessian, 300 litres of paint, 1,000 metres of fencing wire and 12 drums of polyurethane. It took eight weeks with a crew of nine living in the bush working about 12 hours a day. Warner, the designer, also built a series of man-made interiors for the inside of the Fortress and two spectacular caves. These were built in a large warehouse outside Beveridge, Melbourne.'
