The eagerly anticipated crime drama was filmed at locations across Sussex last year. It is based on the international best-selling book Dead Simple by Sussex author Peter James. We asked Argus readers if they were excited to watch the series and the response was overwhelming. BREAKING NEWS I am so excited to confirm that Grace starts Sunday 14 March at 8 pm on @ITV! Many expressed their joy that John Simm had been cast as Detective Roy Grace and said they had high hopes for his performance. Jenny Taylor said: “I have read all the Roy Grace books and can’t wait for the TV series. John Simm will be great as Grace.”