Brenda Blethyn has given fans an insight into what to expect from Sunday’s second episode of the 13th series, titled Tender. In it, Blethyn’s DCI Stanhope will face a new case following the triumph of solving the mystery behind last week’s deadly incident but this time around, it’s Vera who’ll be in need. ITV’s official synopsis for the second film reads: “DCI Vera Stanhope is on track to uncover an intriguing yet puzzling case when the body of a sickly young girl is discovered in a railway siding. “Found in the middle of nowhere she could be anyone but the investigation soon turns up twists a…