A desperate Luis Delgado tells Danny and Baez that the only way he'll testify against his former cartel is if they protect his sons. After a cartel member abducts one of the boys, the FBI investigator working with them urges the detectives to lie as to make Delgado to testify in court, but Danny and Baez resolve to rescue the boy in time by goading the cartel member to reveal where they're keeping Delgado's son by bringing his pregnant wife in on charges of her own. Frank takes heat when Rosemary Martin, blames him for her husband's recent suicide while on the job, openly claiming the NYPD don't have each others' backs as much as it appears; an investigation reveals that her husband was being blackmailed for having an affair. Frank decides to keep this information from Rosemary, earning more ire, and discreetly arranges for her to speak to the officers in her husband's precinct. When Eddie has a gut feeling about a murder, she and Erin band together to solve the case, but Erin earns Eddie's ire by telling her as usually to Danny she needs concrete evidence, not just a gut feeling.
—KGF Vissers