S3, E21: The team helps Danny search for his missing estranged brother, Rafael `Rafi' Alvarez, a recovering drug addict and ex-convict who Danny suspects may have lapsed into his illegal and destructive past habits. Danny is sceptical when Rafi's pregnant girlfriend, the mother of their nine-year-old son, tells him that Rafi has transformed himself into a responsible family man, who recently obtained a business loan.