This is not the first time that the franchise shot on location in Australia. In JAG Boomerang: Part 1 (2000) and Boomerang: Part 2 (2000), the series which spun-off the various NCIS concessions, part of the episodes were filmed in Sydney.
On November 1, 2006 former Russian Intelligence Officer Alexander Litvinenko was poisoned with Polonium-210 at a London Hotel. He died nearly a month later. It was suspected that the operation was carried out by members of the Russian Security Service.
AUKUS, is short for Australia - United Kingdom - United States, and refers to the security partnership between Australia, the United Kingdom, and the United States. The partnership was announced in September 2021. The partnership's goal is to promote security and stability throughout the Indo-Pacific region.
The theme song to the series seems to be a nod to the flagship series NCIS (2003). Moreover, the flashbulb sound effect marking the commercial breaks, seems to be another homage to the original series.
Bob Hawke was former Labor Party Prime Minister of Australia (1983-1991). When Australia won the America's Cup (Yachting), he was reported to have said "Any boss who sacks anyone today for not turning up is a bum".