Friday, 8.30pm, ABC1 Characterised by onscreen chemistry, idiosyncratic comic timing and comradely banter, this sociable vehicle for a talented bunch of older actors from classic British TV series ploughs on, still the BBC’s most popular drama, though darker elements are creeping in as the seasons accumulate. Superintendent Sandra Pullman (Amanda Redman) still heads the Metropolitan Police’s unsolved crime and open case squad, aka UCOS. Under her watchful eye three older detectives were persuaded out of early retirement, seemingly years ago, though James Bolam, who played Jack Halford, took redundancy from the successful show at the start of this series. He was the moon-faced, sad-eyed, empathetic copper who, having been widowed, still chatted companionably to his dead wife whose ashes he buried under the lawn in his back yard. He was one of TV crime’s great characters, the sanest of the UCOS bunch of misfits. He’s sadly missed and tonight the UCOS team’s feathers are ruffled with the arrival of Steve McAndrew (Denis Lawson), a retired detective from Glasgow. He’s brought in to assist in the reinvestigation of one of his original cases but his policing methods, and personal agenda, raise eyebrows even among the sanguine UCOS cops. The case of 17-yearold Georgia Wright (Michelle Duncan), who went missing in Scotland in 2003, is personal for McAndrew and he’s determined to find her regardless.