Trial & Retribution is a feature-length ITV police procedural television drama series that began in 1997. It was devised and written by Lynda La Plante as a follow-on from her successful television series Prime Suspect. Each episode of the Trial & Retribution series was broadcast over two nights. In 2008, series 10 had ten episodes, the longest run of the drama. The last series to date, the twelfth, aired in February 2009.