Knox plans on unloading nuclear bombs into politically unstable African nations, while Matlock reveals why he joined Knox.

In order to stop Knox, Scott comes to Bryant for assistance. Meanwhile Stonebridge has trouble focusing on the mission as he is bent on revenge. Section 20 get assistance from…

Scott and Stonebridge track down a radical Islamic cleric in order to recover the nuclear devices, but are sidetracked by a CIA air strike and hostile locals.

Scott and Stonebridge prepare for an attack by Al Qaeda while holed up in an Algerian farmhouse with the nomad leader and the wounded courier. Meanwhile, back at headquarters, Dalton…

The trail of the missing nuclear triggers leads to Cape Town, South Africa, where kidnappers abduct the children of an expatriate munitions expert to force him to cooperate.

Stonebridge seeks revenge on Craig Hanson after he turns up in Cape Town, South Africa. Meanwhile, Scott reconnects with a Mossad agent who’s been following their case, but with a…

Knox extricates a political leader from a Zimbabwe prison, and the unit tries to catch up with the escapee by tracking his activist daughter.

Unrest spreads after the assassination attempt on political leader Lutulu, while Stonebridge questions the shooter in an isolated police station and looks for a safe way out.

Damian Scott is sent to Mogadishu, Somalia to rescue British diplomats after they are kidnapped by warlord Huseyin Waabri. Meanwhile Michael Stonebridge adapts to his new career outside Section 20.

Scott learns that one of the hostages is a high-ranking military intelligence operative and that Waabri is planning to sell nuclear devices in South Africa.

An MI6 agent called John Allen ends up takeing Stonebridge and Scott from Vienna on a dangerous mission to Kosovo.

In Kosovo, Stonebridge, Scott and four hostages find themselves in dire straits after being double-crossed by KFOR soldiers and the drug lord Hasani.

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.

Section 20 tracks Latif to South Africa, when a former IRA terrorist Daniel Connolly, targets a weapons-system designer. Scott switches places with a computer hacker and finds himself being lured…

Scott manages to pass Connolly’s explosive test and works on bypassing a security code. Bratton contacts Marshall.

There is trouble looming for Claire. Scott and Stonebridge attempt to locate a global arms dealer.

Grant travels to Khartoum when Sinclair and Scott are arrested. Clare is offered a choice by Tahir of either death or starting a new life as his partner. Stonebridge blames…

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…

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…

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…

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…

Collinson sends Porter undercover to Zimbabwe on a mission to break a former British soldier who was involved in a political assassination out of a high-security Harare jail.