Her Negotiation

S14 E24: After making a seemingly routine arrest of a man exposing himself in Central Park, Detective Rollins (Kelli Giddish) has a bad feeling about the suspect and calls upon the entire SVU squad and ADA Barba (Raúl Esparza) to help. With no way to discover the suspect's true identity, he masterfully outplays them at every turn. A shocking theory comes to light, and as Barba's trial comes to a close, the situation rapidly escalates and Detective Benson (Mariska Hargitay) is put into mortal danger.