Despite being an Australian production that is also set in remote Australia, one of the main characters, Sam Dryson, is played by Northern Irish actor Ian McElhinney, the man who portrayed Ser Barristan Selmy in Game of Thrones.
Each state of Australia have their own police force. The Australian Federal Police is the principal federal law enforcement agency of the Australian Government with the unique role of investigating crime and protecting the national security of the Commonwealth of Australia. Officer Andrea Whitford works for Victoria Police. The badge of Victoria Police is very different from what you see in the TV show.