© @Copyright HELLO! Hello! Magazine Thanks to old episodes being resurfaced each weekday on ITV3, fans of have been able to take a trip down memory lane and relive the drama and goings-on in Ashfordly all over again. The police drama aired for almost 20 years and ran for 18 seasons –One of the most recognisable faces from the show is Sergeant Dennis Merton, played by actor Duncan Bell.