Would you take a friend to court to settle a dispute? Could this be awkward?
This is what Australia did with Japan, a key friend and ally, in 2014 over Japan's refusal to stop killing whales in the Southern Ocean.
Special guest Mark Dreyfus is Attorney-General of Australia.
Mark represented Australia in the culmination of a 40-year diplomatic stoush between Australia and Japan which went all the way to the International Court of Justice in The Hague.