“Silver Linings,” the 12th season finale of CBS-TV’s BLUE BLOODS, is another intense, superb drama about a family bringing justice to New York City. Police Sergeant Jamie Regan and his late brother’s son, Joe, a detective, work a case together to find an immigrant woman’s teenage daughter, who’s been sex trafficked. Jamie’s wife is upset when a knife-wielding thief she helped arrest is let go because of the DA’s new sentencing guidelines. Danny Regan and his partner fight to get justice for a woman in witness protection who was murdered. Police Commissioner Frank Regan and his daughter, Erin, criticize the DA’s new guidelines, which clearly put citizens and police in danger.