The series follows John Porter, a former British Special Forces soldier, who is drafted back into service by Section 20, a fictional branch of the Secret Intelligence Service.
The members of Section 20 are thrown back into combat when a seemingly-straightforward mission in Kosovo to rescue a British scientist uncovers a conspiracy.
Production companies：
Double D Productions
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Left Bank Pictures
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Cinemax
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Ingenious Broadcasting
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British Sky Broadcasting
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Overview：The series follows John Porter, a former British Special Forces soldier, who is drafted back into service by Section 20, a fictional branch of the Secret Intelligence Service.
