Summary: The crew of HMS Duncan face their most important mission to date when they receive orders to join a French aircraft carrier carrying out airstrikes against ISIS forces in Iraq and Syria. For the crew, this means seven solid months at sea.

Summary: The crew must defend French aircraft carriers off the coast of Syria, and help evacuate Britains being held in Cyprus.

Summary: The crew have been sent to Ukraine, but the unexpected absence of Russian ships leaves everyone unsettled.

Summary: When Iranian forces take control of the British flagged tanker Stena Impero, Duncan is ordered to the region.

Summary: As Iran still holds the Stena Impero, Duncan is ordered to continue escorting fuel tankers safely through the Strait of Hormuz.