Ten cast members join BritBox/BBC Poirot prequel 'Hercule'

Jack Gleeson, Tamsin Greig and James Nesbitt are among ten cast members added to 'Hercule,' a six-part BritBox and BBC prequel tracing how Agatha Christie's Hercule Poirot became the world's greatest detective. Edward Bluemel leads as a young Poirot. Mammoth Screen and Agatha Christie Limited produce; filming starts in Liverpool in summer 2026 for a 2027 release.