Watch Strike Back Legacy Online at Couchtuner - Strike Back is a British/American action and military television series, based on a novel of the same name by novelist and former Special Air Service (SAS) soldier Chris Ryan. The series follows the actions of Section 20, a secretive branch of the British Defence Intelligence service (DI), who operate several high risk, priority missions throughout the globe. Executive producer Andy Harries gained hold of the novel and pitched a television adaption to Sky, even though he had not read it. Sky commissioned the series as part of a £10 million commitment to adapt novels into original dramas following the successes of adapting Terry Pratchett's Discworld novels. Following Cinemax's participation from the second series, the series faced a re-imagining due to the absence of first series lead Richard Armitage, who was at the time filming The Hobbit in New Zealand. Before filming several cast members participated in bootcamp training by former SAS and Special Boat Service (SBS) officers. The series was filmed on location in South Africa, although parts of the second series were filmed in Hungary.