Locked, loaded and set to resume their high-stakes mission, Section 20 are back. And they've got a big problem on their hands.

Section 20 forges an uneasy alliance with Zarkova in hopes of tracking down a stolen nuclear warhead in Kuala Lumpur; the group grows frustrated when Police Inspector Amy Leong pulls them off the job after a false alarm.

Section 20's search for the missing nuclear warhead leads them to India, where three scientists have been kidnapped by a militant; the team gains valuable intel on Anjali Vartak, a rich Hindu with a personal vendetta against Muslims.

As Wyatt is tortured by Vartak's henchmen, Mac presses her corrupt lawyer to hand over an encrypted hard drive that might hold clues to the whereabouts of a pair of "nuclear suitcases."

Novin and Zarkova find themselves at the mercy of corrupt police, while Mac and Wyatt take temporary refuge in a local village; Coltrane finally learns the location of the suitcase nukes, but the revelation comes at a high price.

As Wyatt convalesces, Coltrane, Mac and Novin embark on a covert, 24-hour mission inside Russia to extract an FSB analyst with potentially vital information. Katrina questions Pavel's true identity, but chooses to stand by her commanding officer.

Coltrane defends his decision to go rogue with S20. After tailing Hassan and the nuclear suitcase to a deserted shopping mall in Jakarta, Wyatt and Novin face down threats from Komodo soldiers and, later, Colonel Aldo and his insurgents.

In pursuit of Pavel, Section 20 clashes with two other Russian renegades, Natasha Petrenko and Artem Orlov, as they attempt to purchase sophisticated software designed to short-circuit a ghost satellite containing precious cargo.

Section 20 faces an ultimate dilemma as it battles Pavel and his team of Russian turncoats for keys to Soviet-era missiles thought to have been destroyed years earlier.

Section 20 are thrown back into combat when a rescue mission unleashes a conspiracy. Series eight of the action-chocked Sky original.

A double cross turns an already dangerous mission deadly as Section 20 board an enemy-packed train to stop the bioweapon's sale.

The team run into an old ally as they're thrown headlong into a dangerous race to stop the cyberweapon falling into Jihadist hands.

Novin is in danger, but saving their soldier isn't Section 20's only mission. The enemy is closing in on the cyberweapon. Fast.

The team race to stop Zayef from terrorist attack that could kill thousands. For Mac, the mission has never been more personal.

Section 20 are sent on a military mission to Bosnia to grab a jihadi financier who could lead them to Zayef Hajdari.

Section 20 successfully destroys the Albanian Mafia's weapons stash, but can they get the truth out of Zayef before it's too late?

A dangerous terrorist is on the loose and it's up to Section 20 to find him.

CIA agent Carolyn Fortier convinces Section 20 to bring in their soldier alive, but the mission goes wrong when Russian forces arrive.

It's never been more personal. Section 20 embark on their final-ever mission as they fight to stop Arianna Demachi's plans in Europe.

Scott and Stonebridge are stranded in the Alps with the mercenaries in pursuit. Scott knows that the CIA hide weapons caches across Europe, so they find a telephone at the farm of a retired Austrian soldier Oscar (Wolf Kahler) to call Christy Bryant (Stephanie Vogt), a past acquaintance from Vengeance, for the location of the nearest one, at a nearby dam.

Section 20 start to close in on terrorist Omair Idrisi and his wife Jane Lowry, but the team is forced to extract devious arms dealer Morgan Ives from Libya.

As Jane Lowry surfaces in Budapest, Mac and Wyatt are forced to go undercover to infiltrate a dangerous group of white supremacists that has something she needs.

Things aren't looking good for Mac. He's blown his cover and is now facing certain death. Donovan digs into Zarin's past... and she doesn't like what she learns.

Section 20 must stop Lowry and Dr Markov from making and unleashing a deadly chemical weapon. In desperate need of intel, Novin infiltrates a drug lord's home.

The daughter of Thailand's British ambassador is kidnapped, so Stonebridge, Scott and the rest of the team sign up for another do-or-die trying adventure.