Emily Dorsch

Pornographic photos from 15 year-old Savannah Biel's (guest star Hayden Tweedie) house party quickly circulate around her Tribeca high school and go viral. Barba's (Raúl Esparza) efforts to arrest the student responsible for posting the images is stalled when several suspects fall victim to a fast-moving measles outbreak. When Benson's (Mariska Hargitay) foster son also catches the illness, she investigates a group of mothers who may have falsified their children's medical records. Meanwhile, Amaro (Danny Pino) receives some distressing news about his son.

When Intelligence busts a meth lab run by gang leader Marshall Carter (guest star Aaron Roman Weiner), they uncover a re-homing scam in which children adopted from foreign countries are abandoned, then sold online. Meanwhile, Atwater (LaRoyce Hawkins) struggles with the difficult decision about whether to move his siblings Jordan (guest star Kylen Davis) and Vinessa (guest star Bobbi MacKenzie) to a safer environment outside of Chicago.

When Watson is implicated in a DEA investigation into doctors writing illegal prescriptions, she and Holmes search for the person using her medical license to sell drugs.

A novelist is found dead in her car, which appears to be a suicide at first inspection, but Detectives Cyrus Lupo (Jeremy Sisto) and Kevin Bernard (Anthony Anderson) have reason to believe a cult known as "Systemotics" is involved. The victim's husband, Bradley Cameron (guest star Daniel London) explains to the detectives that he and his wife were paranoid that members of the cult had been trailing them recently. However, Bradley comes under suspicion as the detectives begin to chip away at his alibi. When the case goes to trial, ADA Michael Cutter (Linus Roache) has trouble prosecuting his case when several members of the jury fear for their own safety. Sam Waterston, S. Epatha Merkerson, and Alana De La Garza also star.

At the Farm, the trainees learn their next task is to decide on a drone strike, which triggers Alex's memories of Simon's sacrifice. Meanwhile, Shelby and Leon's relationship reaches the next level, and Nimah advises Alex and Ryan not to trust Harry. In the future, Alex questions if she can trust Lydia, leading to combat between the two.