When two cops working the projects make the life-or-death decision to rush an injured child to the hospital without waiting for an ambulance, Frank winds up defending them against accusations they aggravated the child's injuries.
When two off-duty cops are involved in a shooting outside a gym, Frank quickly turns from protecting them from I.A. to investigating them for wrongdoing himself. He soon discovers the two cops are dealing steroids.
When an officer is killed in a roadside ambush, his emotionally shattered partner is accused of incompetence after giving a statement while he is still in shock. Frank must protect the officer, even if it means changing the rules of how officers are questioned after a shooting.
When an undercover operation goes wrong, I.A. suspects a leak, and targets a female cop with family connections to a street gang. Frank, however, doesn't believe she's guilty, and backs her when no one else will.
As a wounded Billy barely hangs on to life, Frank and his team find themselves mysteriously under siege by a team of faceless attackers. Frank quickly sets up a war room at Rabbi's bar to keep his friends safe, and devise a plan to strike back.