Kevin McKidd has been cast as the lead actor in ITV drama "The Only Suspect", set in a London suburb and adapted from a novel by Louise Candlish. The drama follows a couple who live in a suburban life hidden under an assumed name, leading to the unravelling of their lives. The four-part drama will be executive produced by Fremantle’s Red Planet Pictures and directed by Farren Blackburn. Filming will begin in London this Spring. ITV's Director of Drama, Polly Hill, and Drama Commissioner Huw Kennair-Jones have ordered the thriller.