JAN MOIR asks the questions ahead of Britain's favourite cop thriller returning 

JAN MOIR: Next weekend Britain's favourite cop thriller returns for a sixth series -and not a moment too soon. https://www.dailymail.co.uk/tvshowbiz/article-9357351/JAN-MOIR-asks-questions-ahead-Britains-favourite-cop-thriller-returning.html?ns_mchannel=rss&ns_campaign=1490&ito=1490