ITV 's popular crime drama Grace is returning to our screens this autumn – and some exciting guest stars have joined the season four cast. The series, based on author Peter James' best-selling novels, stars John Simms as Brighton detective Roy Grace as he and his sidekick DS Glenn Branson (Richie Campbell) investigate grizzly crimes across the city. The Night Caller 's Robert Glenister will make his debut on the show in the opening episode, 'Dead Man's Time', which premieres on ITV and ITVX on Sunday 1 September at 8pm.

Robert plays the character Gavin Daly in the episode and while we don't know much about his character, we do know that the opening instalment sees DS Grace and DS Branson investigate a vicious robbery. The full synopsis reads: " A vicious robbery at a secluded Brighton home draws Grace and Branson into a puzzling enquiry when thousands of pounds worth of beautiful antiques are stolen from the house. As Grace digs deeper into this mysterious crime, he unearths a web of ancient grudges, a web which leads him down a dark and murderous trail through the world of Brighton antiques in a race against the clock to untangle who is at the heart of this robbery and bring Gavin Daly the answers he has been desperately chasing for many years.

" Robert isn't the only guest star in the show, which returns with four feature-length episodes. Grant Burgin ( Hijack, Coronation Street ) also features as Mark Drake, while Carolyn Pickles ( Broadchurch ) plays Aileen Daly. As for .