The John Dahl directed episodes are usually the best and darkest but this one sucks. The ethnic female detective who, for obvious reason is smarter than everybody, basically just kidnaps Smitty, detains and interrogates him without a shred of legality. Smitty, who should be a hardened New Yorker doesn't even question her methods when even an infant would know better and at least keep his mouth shut.
Insufferable Bridget after having confessed her adultery for no reason and ruined Smitty and Adam's life is still forcing them to do what she wants.
Daryll, the most useless character in the shows, attributes to racism the fact that to accept someone as a brother one should at least spend some formative years together, if not the whole childhood, like real siblings do. Regardless of the colour of his skin, some animosity should be expected - in fact, way more than shown in the series - considering the circumstances of his birth. He waltzes in as a grownup in the middle of a dysfunctional family and expects to be treated like he belongs there, which he actually doesn't, even if he was a blonde, blue-eyed Arian boy.
Daryll is the result of adultery committed while a mother of four was dying of cancer. Surely not his fault, but not exactly a brotherly love-inducing circumstance. Not only that but in this episode he's apparently shocked by violence and disapproving of Mick and then protecting Mick against Ray because... who knows? Schizophrenic to say the least.