Series exploring the covert activities behind Japanese lines of covert operatives working from a secret headquarters in Sydney.
According to Don Storey, in his Classic Australian Television, Mirams determined not to dwell on Japanese treatment of prisoners of war nor to show the Australians as incorruptible heroes, but did intend to counter the idea that the war was won entirely by American soldiers.
According to Storey,
Mirams could only provide money for the pilot. Each episode cost approximately $23,000 for a return of only $18,000, which over 42 episodes amounted to a loss of almost a quarter of a million dollars. At one stage cash flow became so tight that Thompson and Sumner went 'on strike' until they got paid. To cover his debts Mirams sold his rights in the series to Paramount Pictures. Consequently, Mirams made nothing from the show despite excellent overseas sales.
Albert Moran, in his Guide to Australian Television Series, notes of script-writer Ron McLean that 'McLean was never one to get precious about originality and Spyforce cheerfully plundered such stories as Callan, The Spy Who Came In From The Cold, the James Bond stories and The Bridge on the River Kwai for many of its narratives.'
Storey sums up Spyforce as follows: 'The show improved as it went on - the episodes became tighter and faster, and the directing proved more imaginative. The lead cast gave excellent performances, and the special effects got better - all testimony to the short-cuts and improvisation which the series is legendary for.'