Ex-spy Max Easton is brought out of retirement against his will by George White, London chief of MI6/CIA team 'The Section'.

When Amanda Jones arrives in London she brings the full force of CIA dissatisfaction to bear on White, who struggles to retain control.

Anna and her brother struggle to protect her daughters in France. Alexander Said, who led the team in Tehran, arrives in London, but The Section head is in no mood for forgiveness.

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In Washington, we meet the CIA's Amanda Jones. Max, now in Beirut, doesn't know who to trust after speaking to Leyla, a member of The Section team there.

Anna and her brother struggle to protect her daughters in France. Alexander Said, who led the team in Tehran, arrives in London to see White, but The Section head is in no mood for forgiveness. Max and Leyla stumble upon some information that could help them.

In Mali, four U.S. Special Forces and a translator are supposedly killed in an ambush. This delays a procurement deal in Washington, and it is up to the deep state’s operative Nathan Miller to make sure everything goes to plan, while also battling to keep his family together.

Miller, along with Amanda Jones, flies to Mali to contain an increasingly unstable situation. In order to make sure a deal gets over the line, he hatches a plot that will tie up a number of loose ends for him.

Harry and Leyla learn from Aïcha that weapons smuggling has been the goal all along. The trio must throw themselves at the mercy of a high-level Malian minister who is supposedly fighting corruption...but can they trust her?

True to her word, Aminata Sissoko reunites Aïcha with her family, but as she does, Harry and Leyla are faced with a crisis. Harry turns to Miller and makes a deal to ensure their safety.

Harry, Aïcha and Leyla are driven, out of necessity, to return to Al Moctar’s camp. In the search for the trio, Jones reveals a sensitive piece of information to Miller.

With Aïcha close to danger, Harry must act quickly. He convinces Al Moctar to hold off on any action, and realizes that the deep state may be pulling away from him.

Al Moctar's base is attacked. Amanda Jones is feeling vulnerable. Senator Sulivan continues her investigation. Leyla, Aisha and Harry investigate where the arms are coming from. Miller makes some hard choices.

Finally, all the pieces of the puzzle come into place, and the connection between the arms trail and the deep state is laid bare.

In London, Max’s digging stirs the attention of a sniper. In Washington Jones sends out a team to recover scientific evidence from an Iranian desert facility.