The Best Episodes Written By Tony Saint

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 South African police to stop Knox's plot.

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

Peterson completes his mission, revealing his deadly and amazing intentions. Nahid and Tamar settle scores. Tamar and Faraz confront each other, and are faced with difficult choices.

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.

A family reunion years in the making comes to pass. With Mariama's help, Assane makes a final play to stop Keller, right his wrongs and go out in style.

An unfathomable loss rocks France, but Guédira and Raoul grapple with denial. A mysterious classified ad resurrects old ghosts and long-lost hopes.

To mend matters with Claire and Raoul, Assane devises a plan to get them out of France. But with high stakes come greater risks — and no room for error.

Increasingly suspicious, Claire launches an investigation of her own. Guédira gets the surprise — and opportunity — of a literature lover's lifetime.

The UNIT are after an important drug dealer called Xavier and they’re monitoring his every move in the hope he’ll lead them to somebody even higher up in the organisation.

The team race to find a dangerous new supplier before his drugs flood the streets.

Peterson's trapped situation gets more complicated. Tamar must take a risk and get closer to the powerful Tehrani smuggler, Ramin. Nahid becomes desperate.

Faraz makes an unbelievable offer. Tamar and Nissan gamble on their fate. Eric Peterson reveals his true colors.

Having identified his opponent, Assane races to protect his family and avoid retaliation. Belkacem remains wary of Guédira; Mariama sends a message.

A botched operation leads Ash to join the UNIT: a new undercover law enforcement team,operating outside of the police but with one goal in mind - to get to the criminals at the very top.

As Fleur and Guédira strike a deal, Belkacem visits Benjamin. Assane tries to outmaneuver a new enemy in the shadows while keeping tabs on his family.

Assane meets his mother's captor in the flesh, but there's no sign of her. Tasked with another all-or-nothing heist, he makes a devastating choice.

After Milad is murdered by the Israeli Mossad and her life is miraculously saved, Tamar simultaneously evades the Mossad and the Revolutionary Guards. A discovery she reveals changes the picture. At the same time, Faraz and Nahid fight for their survival.

Faraz forces Tamar to go to the most dangerous place for her. Nahid tries to change her life and makes an alliance. Peterson is discovered where he wasn't supposed to be.

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

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.

The U-boat crew struggle with recent events and what lies ahead. A revelation in La Rochelle infuriates Forster spelling bad news for Simone.

Tennstedt and Hoffmann continue to butt heads aboard U-612, while rebel Carla Monroe plans a mission in La Rochelle.

An inexperienced U-boat crew are plunged into a perilous secret mission, while new translator Simone starts work at the base.