photos news photos news Castle Sinister 1948 49 min Horror, Thriller During the War, a British agent travels to the remote Glennye Castle in the wilds of Scotland to investigate a mysterious murder by a masked phantom. Who or what is the phantom? And how are the Germans involved? where where to watch AU CA GB GG IE MX US ✕ data from JustWatch watched want to watch oscars IMDb 3.6 director Oscar Burn writer Mary Cathcart Borer news ✕ loading… photos ✕ cast M Mara Russell-Tavernan Gabrielle, Marchioness of Glenye R Robert Essex Nigel Glenye K Karl Meir Maj. Martin Selwyn J James Liggat Capt. Neale (as James Liggatt) J John Gauntley Michael Glenye Alastair Hunter McTavish M Maureen O'Moor Maggie