Law & Order: Special Victims Unit - Season 16 - Eps 20: Daydream Believer (III)
A Chicago crime resembles a decade-old New York City case, so police from Chicago arrive and team up with the squad to track down a suspect they had to release earlier. The crossover starts on Chicago Fire S03E21 We Called Her Jellybean (I) and Chicago P.D. S02E20 The Number of Rats (II).
About Law & Order: Special Victims Unit

Title: Law & Order: Special Victims Unit
First Air Date: 1999-09-20
Last Air Date: 2025-05-15
Status: Returning Series
Rating: 7.935/10 (from 3994 votes)
Language: EN
Seasons: 28
Total Episodes: 574
Network: NBC
Genres: Crime, Drama, Mystery
Production Companies: Wolf Entertainment, Universal Television, Studios USA, Universal Media Studios
Synopsis
In the criminal justice system, sexually-based offenses are considered especially heinous. In New York City, the dedicated detectives who investigate these vicious felonies are members of an elite squad known as the Special Victims Unit. These are their stories.
Cast

Mariska Hargitay
Olivia Benson

Kelli Giddish
Amanda Rollins

Ice-T
Odafin 'Fin' Tutuola

Kevin Kane
Terry Bruno

Aimé Donna Kelly
Captain Curry