Chris Ryan's Strike Back is a six-part British television series based on the novel of the same name written by best-selling author and former soldier of the Special Air Service, Chris Ryan. It was produced by Left Bank Pictures for Sky1. The cast of Strike Back is led by Richard Armitage and Andrew Lincoln, also starring Orla Brady, Shelley Conn, Colin Salmon and Jodhi May, including a variety of guest appearances including Toby Stephens, Ewen Bremner, Dhaffer L'Abidine, Shaun Parkes and Alexander Siddig. The series follows John Porter (Armitage), a former British Special Forces soldier, who is drafted back into service by Section 20 of the Secret Intelligence Service (MI6). The series ran on a multi-million pound budget, and was filmed entirely on location in the Province of Gauteng, South Africa. Ryan became a series consultant. Strike Back commenced airing on 5 May 2010 with two episodes showing a week. The first episode was viewed by 400,000 in the United Kingdom, and was met with generally positive reviews; they were ranged from "British action series that packs a Die Hard-style thrill around every corner," to "polished, watchable hokum," to a more negative "pathetic male fantasy". It will be released on DVD and Blu-ray on 7 June 2010.