Dixon Of Dock Green, the nation's favourite Saturday night serial 60 years ago, is returning to our screens - but not as a TV drama. Whistling his theme tune, hands clasped behind his back as he patrolled his beat, he left no crime unsolved. In a dystopian twist, Sgt George Dixon is apparently to be the AI face of Home Secretary Shabana Mahmood's police reforms. We saw him sozzled and silly, blotto and boisterous, plastered and pugnacious, and finally mashed and maudlin. Grantchester has seen a succession of sleuthing vicars with streams of lovelorn lady admirers.