Focuses on two members of Section 20, a secret British anti-terrorist organization: Michael Stonebridge (Philip Winchester), a consummate British soldier still struggling to overcome tragedy in his life, and Damien Scott (Sullivan Stapleton), a disgraced U.S. Delta Force operative who has found redemption with S-20. This season opens in Colombia, with parallel missions in Beirut, Budapest, Russia, and Germany - and following a trail of drug money that is funding terrorists in the Middle East.

Based on the book by Chris Ryan. Special features: Audio commentary with cast & crew; 9 "How To Strike Back" featurettes.