Currently filming on location in South Africa and Hungary, the new ten-part series will air on Sky1 this summer.

Martin Clunes, Dougray Scott and Robson Green will join the cast for Series 4, which sees Section 20 will pursue a deadly terrorist network from Colombia to Beirut to Europe where they uncover plots reaching to the West.

Watch the video…

> Buy Series 3 on DVD on Amazon.

Are you looking forward to Series 4? Let us know below…