High Treason is a 1951 British spy thriller. It is a sequel to the film Seven Days to Noon (1950) from the same team. Director Roy Boulting, co-director (with his brother John) 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. Plot Enemy saboteurs infiltrate the industrial suburbs of London, intending to disable three power stations in London and five other stations elsewhere, all strategically located throughout the UK. Their motive is to cripple the British economy and to enable subversive forces to insinuate themselves into government. The saboteurs are thwarted, not by counterintelligence agents, but by workaday London police officers, and finally by a repentant betrayer from their own ranks. Cast Liam Redmond as Commander Robert Brennan André Morell as Superintendent Folland Anthony Bushell as Major Elliott Kenneth Griffith as Jimmy Ellis (Soviet agent) Patric Doonan as George Ellis Joan Hickson as Mrs Ellis Anthony Nicholls as Sir Grant Mansfield, M.P. (Head Soviet agent, and putative Prime Minister after the incumbent government's overthrow) Mary Morris as Anna Brown (Soviet agent) Geoffrey Keen as Morgan Williams (Soviet agent) Stuart Lindsell as Commissioner John Bailey as Stringer Dora Bryan as Mrs Bowers Charles Lloyd-Pack as Percy Ward Laurence Naismith as Reginald Gordon-Wells Michael Ward (actor) as Music Club Member (uncredited) Dandy Nichols as Doorstep Cleaner (uncredited) Alfie Bass as Albert Brewer (uncredited) Jean Anderson as woman in street (uncredited) Glyn Houston as railway shunter (uncredited) Peter Jones (actor) announcer at music club (uncredited) Moultrie Kelsall as ship's captain (uncredited) Howard Lang as policeman who discovered Jimmy's body (uncredited) Harry Locke as Andy, the telephone engineer (uncredited) Victor Maddern as anarchist (uncredited) Tony Quinn as chemistry lecturer (uncredited) Marianne Stone as Alfie's mother (uncredited) Bruce Seton (uncredited) Critical reception An unnamed New York Times reviewer commented, "it is worthy to note that High Treason travels at a more leisurely pace than Seven Days, but Roy Boulting, who also directed, achieves an equally intelligent handling of the many pieces needed to fit his intricate jigsaw of a plot," and remarked that, "deft direction, crisp dialogue and a generally excellent