At the height of the Cold War, in April 1954 Vladimir Petrov a Soviet diplomat sought political asylum in Australia. Petrov, and his wife Evdokia, were working in Canberra at the Soviet Embassy as diplomats. But they were really spies. The incident had a massive impact on Australian politics. It ended the political career of the opposition leader and leader of the Labor Party Dr Herbert 'Doc' Evatt. And it led to a split in the Labor Party when anti-communist elements of the Labor Party, particularly the Catholic groups, split off to form the Democratic Labor Party. Partly as a result Labor languished in opposition until 1972. 

For those Russian speakers out there, apologies for mangling the pronunciation of Russian names.