DCI Banks: Bad Boy

When Banks’ old neighbour tells him that she has discovered a gun in her teenage daughter’s bedroom, his instinct is to quietly retrieve the weapon. But when Helen convinces him that she should lead a firearms team to take possession of the gun ‘by the book’, neither she nor Banks foresees that the incident will lead to an innocent man being critically injured. Soon, an internal investigation threatens to break up Banks’ team when Annie is ordered to scrutinize Helen’s role in the operation. The subsequent professional divisions are made worse by Annie and Banks’ fledgling romantic relationship. Meanwhile, news that the gun has been recently fired leaves Banks searching for both its owner and a potential victim. On the trail of a notorious ‘bad boy’, Banks soon discovers a connection which brings the case worryingly close to home

DCI Banks: A Piece of My Heart, Friday at 9 p.m. on PBS 6.