Jessica Pimentel

A starving toddler found wandering the streets alone leads detectives to the home of Manuela Ozuna (guest star Jessica Pimental) and another child in grave condition. The police question Department of Child Services caseworker Keith Musio (guest star John Magaro), whose vague and backdated reports on the family suggest he hadn't checked on the children in months. When the overworked Keith accuses his supervisor, Janette Grayson (Goldberg), of orchestrating the false reports, Chief Dodds (guest star Peter Gallagher) promises to conduct an internal investigation. But when neglect leads to death, Barba (Raúl Esparza) takes matters into his own hands and arrests them for manslaughter. Meanwhile, Dodds indicates some changes coming to Benson's (Mariska Hargitay) squad.

Danny and Baez's investigation into the death of a chess hustler is complicated by interference from the victim's son. Also, Erin is offered an endorsement of her run for D.A. by an influential Harlem pastor in exchange for a professional favor.

In the Season Four finale, Finch and Root race to save The Machine, which has been located by its AI rival, Samaritan. Also, Reese is caught in the middle of the final showdown between rival crime bosses Elias and Dominic.

Reese volunteers as an NYPD Police Academy instructor in order to keep an eye on a talented young officer whose suspicious actions make him question her motives. Meanwhile, Martine – armed with information from Samaritan – hunts a member of the team.

Reese and Finch must protect Harper (guest star Annie Ilonzeh), a street-smart grifter, when her plan to steal cash from a medical marijuana dispensary goes up in smoke. How many enemies can one person make?