 The US broadcast and release of the series, via Acorn Media, separates the series into four episodes of 50 minutes each, with the additional fourth episode being entitled "The Showdown".The series is set in Liverpool and Manchester, and the main action takes place in the present day, with a backstory of events surrounding the 2003 Iraq War.Alongside Liverpool and Manchester, the series was filmed in Wirksworth, Derbyshire, on the Ecclesbourne Valley Railway.