High Treason is a 1951 British espionage thriller filmed in the style of such American "docudramas" as The House on 92nd Street and T-Men. It is a sequel to the Oscar-winning 1950 film Seven Days to Noon. Director Roy Boulting, co-director and co-writer of the first film also directed and co-wrote this one. Frank Harvey, Boulting's co-writer, was also a co-writer of the earlier film. André Morell reprises his role as Detective Superintendent Folland of Scotland Yard's Special Branch from the first film, though in High Treason he is subordinate to the head of Special Branch, Commander Robert "Robbie" Brennan, played by Liam Redmond.