With a nuclear arms race set to escalate the Cold War, Prime Minister Menzies appoints Colonel Charles Spry to take charge of the fledgling Australian Security Intelligence Organisation, ASIO. The staunchly anti-communist, fifth-generation soldier recruits new officers to fight a covert war against a cunning enemy. Their primary task is to investigate Australians spying for the Soviets and infiltrate Communist Party branches with undercover agents.
| Actor | Role |
|---|---|
 Tony Llewellyn-JonesSir Charles Spry OM OAM | Sir Charles Spry OM OAM |
 Hugo WeavingNarrator (voice) | Narrator (voice) |
 Bob BainesBob Wake | Bob Wake |
 Leanne MauroFrances Burnie | Frances Burnie |