It’s Reagan versus Reagan when Danny goes against Jamie’s direct order during a hostage negotiation. Also, Nicky asks Erin for help when her friend is in jeopardy of losing his scholarship because of a crime he didn’t commit, and Frank helps a distraught officer who accidentally shot an innocent girl.

Danny and Baez work with Texas Ranger Waylon Gates when they are put on a case to find the Lone Star Killer. Also, after Eddie's partner, Officer James Addison, mistakenly shoots an undercover cop, internal affairs accuses Jamie of not supervising properly, and Frank speaks with Officer Addison about why he shouldn't turn in his shield.

Danny and Baez are faced with tracking down a drug dealer after two young models are found dead from an overdose. Also, Eddie and Jamie team up to determine who the mastermind is behind a robbery.

Erin is stalked by a man who was recently released from prison; Jamie works to save his badge when he is caught driving under the influence after he is unknowingly given drugs at a party; Frank navigates multiple family issues.

Danny and Baez investigate a series of violent robberies targeting luxury timepieces; Erin is conflicted about criminally charging a potentially innocent man; Frank is forced to reopen a case in which the officer involved was acquitted.

Erin and Anthony clash when Anthony's daughter is the sole eyewitness to a fatal shooting; Frank wants to punish an off-duty cop for his inaction during an armed robbery; Danny and Baez investigate a violent mugging.

Danny partners with Texas Ranger Waylon Gates to deliver an infamous drug cartel boss to arraignment, but the mission becomes complicated when the criminal threatens to harm the Reagans; Erin takes on a highly contentious assault case.