When young Milo is having breakfast, the TV in the foreground is playing previous Syfy channel show Battlestar Galactica (2004).
Arthur C. Clarke is the only Sci-Fi writer to have been nominated for the Nobel Peace Prize and is also known for his collaboration with Stanley Kubrick on 2001: A Space Odyssey (1968).
The idea of vast alien spacecraft floating over major cities comes from the 1953 novel by Arthur C. Clarke. In his introduction to the 1989 edition, he explains that it was inspired by the sun glinting off of a group of balloons over London during World War Two. The idea was later borrowed by other science fiction dramatizations, notably V (2009) and Independence Day (1996).
Filming at The Royal Exhibition Building, a World Heritage Site-listed building in Nicholson St, Carlton, Victoria, Australia.
In the opening scenes when the newspaper falls to the ground you can see on the top of the page the name of an actual Australian newspaper called, oddly enough, "The Australian", but as the front page falls down over it, it is now the fictional USA Morning Post.
The series was filmed in Melbourne, Australia.