Section 20's Thomas 'Mac' McAllister (Warren Brown), Samuel Wyatt (Daniel MacPherson), Gracie Novin (Alin Sumarwata), Manisha Chetri (Varada Sethu) return with Colonel Alexander Coltrane (Jamie Bamber) back in command. Guest stars include Ivana Miličević (Banshee, Gotham, The 100) and Alec Secăreanu (God's Own Country, Baptiste).

The kidnapping of a British scientist leads Section 20 into a conspiracy involving a terror group on the rise, who have seemingly emerged from nowhere. The mission takes them from the Mafia strongholds on Europe through Tel Aviv and Venice and beyond - and when a terror attack rocks a European city, they realise even darker forces at work here. Loyalties will be tested, alliances shattered, and not everyone will make it home alive. Featuring fast-paced action and breath-taking stunts, Strike Back returns for one final mission.