The cast for season three of surveillance thriller The Capture has been announced. The next instalment of the hit BBC One programme will put Holliday Grainger's character, Rachel Carey, "at the heart of the conspiracy", according to series creator Ben Chanan.

Filming is taking place in the south east of England. In the new season of the TV show Rachel has become the acting head of the Counter Terrorism Command (SO15), amid an inquiry into the unlawful use of Correction – the UK intelligence service's clandestine video manipulation programme which she exposed in season two.

She is determined to regain the public's trust in surveillance technology when a well co-ordinated act of terror that affects the British establishment leaves behind just one witness.

Grainger, 37, said: "I'm thrilled to be joining The Capture team once more for season three. Ben Chanan's scripts are as electrifying as ever and I'm excited to be stepping back into 'Commander' Rachel Carey's world. (Spoiler alert!)"

Cast for season three

Joe Dempsie at the BFI and Radio Times Television Festival
Game of Thrones star Joe Dempsie joins the cast

Game Of Thrones actor Joe Dempsie, Kaos actor Killian Scott, Black Doves star Andrew Buchan, Gangs Of London actress Amanda Drew, and Highlander's Hugh Quarshie all join the cast for season three. Returning cast members include Indira Varma as BBC Newsnight presenter Khadija Khan, Ben Miles as Danny Hart, and Nigel Lindsay as DSI Tom Kendricks.

Chanan said: "Previous seasons have seen Holliday's Rachel Carey investigate others as their lives fall apart. Most of all, I am excited that season three puts Carey at the heart of the conspiracy."

Lindsay Salt, director of BBC Drama, said: "The Capture's irresistible blend of timely, state-of-the-nation commentary with edge-of-your-seat thrills has made it a big hit with millions of viewers, and we're so pleased to announce its return to the BBC. Ben's scripts for series three will dazzle and terrify you in equal measure."

The first season followed a former British soldier trying to clear his name of a crime he claimed he did not commit. While investigating the case, DI Carey uncovered a wider complex conspiracy.

In season two Grainger's character broadcast a live deepfake of a government minister to the nation, exposing the UK intelligence service's clandestine video manipulation programme Correction. The Capture is produced by Heyday Television for BBC iPlayer and BBC One.

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