Mission director Gus takes the heat after a mysterious missile downs an aircraft. Meanwhile, the Pine Gap officers navigate life in the Outback.
Gus faces a new reality, while questions linger about the terrorist attack. Ethan and Kath must turn to old-school spycraft to unearth a mole.
Things heat up between Jasmina and Gus as their loyalties are tested. Kath and Rudi try to close in on the truth at an A-Crew party.
Caught overstepping boundaries, Jasmina is bullied by Jacob and comes clean to Gus. Moses makes an unexpected connection that may cause trouble.
Everything comes to a head as the hacker hunt heats up. Ethan confronts Kath, and Gus shows his hand. Moses is investigated, while Jasmina feels torn.
As multiple crises erupt, the threat of war looms. A traitor remains at large, a sensitive video is leaked, and a pilot must be found and rescued.