In the years before Pearl Harbour, Australian authorities were convinced that members of the Japanese diplomatic and business community were spying, and that some of their Australian associates were helping them. But how much espionage and theft of secrets really occurred? 

• Guest: Nick Hordern, author, former diplomat and policy advisor with the Australian Government, and former senior journalist with the Australian Financial Review. 
• New book ‘Loyalty: Australians, Japanese and Espionage, on the eve of the Pacific War’ (Australian Scholarly Publishing)  
• Producer: Ann Arnold