The characters begin their journey evacuating from the town of Wyndham in Western Australia, which was bombed by the Japanese during World War Two. Eight Japanese fighters hit Wyndham on 3 March, 1942. This was two weeks after the first attack on Darwin and simultaneous to the first attack on Broome, which were the deadliest and second deadliest air raids in Australia of the whole war and provoked panic across northern Australia.
The opening narration lays the story in the Northern Territory of Australia. However, the characters begin their journey in Wyndham which in the state of Western Australia.
The state of Victoria is not shown on the map at the start.
Chips Rafferty starred alongside Jack Lemmon playing the island watcher Patterson in The Wackiest Ship in the Army (1960).