Still haunted by the memory of a disastrous Special Forces mission which he led in 2003, John Porter is given an opportunity to redeem himself by returning to Iraq to rescue a kidnapped TV reporter.

After locating the terrorist safe house Katie is being held in, Porter is also taken prisoner, and Hugh Collinson and a team at Section 20 have to act quickly before it is too late.

Porter and Masuku become the hunted as a bushman tracker leads the relentless Zimbabwean authorities after them, and Layla Thompson becomes increasingly aware of the tension that exists between Porter and Collinson.

British sergeant Michael Stonebridge recruits help from Ex-Delta Force operative Damien Scott when an agent named John Porter is kidnapped by a Pakistani terrorist. The two then uncover clues to a possible terrorist attack at a New Delhi hotel and they race there to foil it.

An Indian general decides to hold off on the assault on a New Delhi hotel that has been under siege when he learns that Scott and Stoneridge are in the hotel and they have ID'd the weapons scientist known as Mahmood.

Scott and Stonebridge head to Chechnya to track down Latif and a stockpile of chemical weapons.

In the season finale, Stonebridge and Scott are in a race against time to find a pair of suicide bombers targeting Budapest.