An Inspector Calls is a 2015 British thriller television film written by Helen Edmundson, based on the J. B. Priestley 1945 play of the same name. It is directed by Aisling Walsh, produced by Howard Ella and stars David Thewlis as the titular character. The story is centred on a mysterious inspector, who investigates the socially ambitious Birling family and a dinner guest following the suicide of a young woman. The film was first broadcast on 13 September 2015 on BBC One.