TMDb/Kevin McKidd Celebrity Kevin McKidd stars in his first major role since leaving Grey's Anatomy, headlining the ITV thriller The Only Suspect, a dual-timeline mystery. April 23, 2026 AceShowbiz - Kevin McKidd, known for his role on Grey's Anatomy, is set to headline the upcoming ITV thriller The Only Suspect. The drama is adapted by Simon Ashdown, who previously worked on Trigger Point, from the novel by Louise Candlish. This project marks McKidd's first major acting role since departing from the medical drama series, where he was both a cast member and director.