The Reagan family continues to serve and protect the streets of New York in the fifth tumultuous season of the show. Oldest son Danny works to convict a national felon as well as resolve a dangerous hostage situation. Erin faces numerous challenges as she navigates the judicial system, enduring the retrial of a woman she's already convicted, as well as enlisting the testimony of a protected mob informant. Meanwhile, Jamie's desire to help lands him in a few troubling situations.