"Chicago Crossover" is the seventh episode of the sixteenth season of the American police procedural-legal drama, Law & Order: Special Victims Unit, and the 350th overall episode of the series. It originally aired on NBC in the United States on November 12, 2014. In this episode, the SVU team meets up with the Intelligence Unit of Chicago P.D. to solve a decades-old child pornography ring case, which is personal for CPDs Detective Erin Lindsay (Sophia Bush).

The episode was written by Ed Zuckerman, Warren Leight, and Dick Wolf, and directed by Steve Shill. This episode marks an unprecedented crossover in Law & Order franchise history where three shows (all three created by Wolf) crossover with one main storyline. The story began in the 7th episode of season 3 "Nobody Touches Anything" of Chicago Fire where a fire victim was found with child pornography. The Fire Department turn the case over to the Chicago Police, who take on the initial investigation that leads them to Manhattan, where the detectives from Chicago P.D. team up with the SVU in "Chicago Crossover". The story concludes in the CPD episode "They'll Have to Go Through Me", where the main suspect returns to Chicago after leaving behind clues in New York. Filming on "Chicago Crossover" began on October 9, 2014, in New York City. NBC began using the hashtag "#CrossoverWeek" in their on-air promos for the three shows' episodes.

"Chicago Crossover" was seen by 10.01 million viewers making the second most viewed program of the night on NBC and the second ranked program in the time slot. Critical response to the SVU episode of the crossover was generally positive, many critics praising the tension-filled scenes and 'fireworks' between lead actors Mariska Hargitay and Jason Beghe, who portrayed Sgts. Olivia Benson and Hank Voight, respectively; Lou Taylor Pucci was also praised for his portrayal of Teddy Courtney.

Plot The episode starts where the Chicago Fire episode "Nobody Touches Anything", left off—where the CFD firefighters rescued a man from a burning building and in his possession, he held a box full of child pornography, a box that was dropped during Lieutenant Kelly Severide's (Taylor Kinney) attempt to save the man's life. The CFD then turned this evidence over to the Chicago police. Detective Erin Lindsay has a personal stake in the case: her half-brother is involved somehow and in New York City. Benson gets a call from Voight that his team is on a plane to Manhattan to help the SVU solve the case.

Lindsay explains to the SVU about how her half-brother Teddy Courtney (Lou Taylor Pucci) went missing when they were younger and how her mother thought that somehow, he ran away to New York. Benson tells Lindsay that the National Center for Missing and Exploited Children (NCMEC) ran Teddy’s face through their system, and they found more images and concluded that he was connected to a child sex ring. While searching for Teddy, they learn from the NCMEC that another young boy, Henry Thorne (Christian Goodwin), is being victimized on a live stream—although at the time, no one could track down where the feed was originating from. They learn from the photos found in the Chicago fire that the ring is called the "Chess and Checkers Club" and that it originated out of Chicago back in 2004; NCMEC pushing the federal government to shut down the website, but to no avail.

Later, through advanced facial recognition, the detectives discover that Teddy went under the name Teddy Voight, and has a juvenile record, having been arrested for solicitation five years ago. Lindsay explains to Detective Jay Halstead (Jesse Lee Soffer) that they knew Sgt. Voight before. SVU detectives Nick Amaro (Danny Pino) and Amanda Rollins (Kelli Giddish) go to a youth center where Teddy was remanded and learn that Teddy frequently ran away from the center. Security guard George Turner (Danny Mastrogiorgio) doesn't remember Teddy, but Miss Bagley (Donnetta Lavinia Grays) recommends that the detectives talk to Jocelyn Cerpaski (Isabel Shill), who left the center to start a better life. Jocelyn initially doesn't want to talk to the detectives, but she directs them to the piers where Teddy solicits. Rollins and Halstead find him and bring him in.

Lindsay tries to talk to Teddy, but he refuses. Benson tells Lindsay that they have him on narcotics possession. Benson tries to get Teddy to open up about what happened to him by letting him know that another boy is in danger, but he remains silent. Amaro and Rollins go back to Jocelyn, and learn that Teddy assaulted her. Later, Benson and Lindsay push Teddy, reassuring that he raped Jocelyn because his abusers forced him to. Teddy breaks down and admits what he did, reasoning that if he hadn't, the child sex ring would have had someone else hurt her worse. Teddy explains to Benson and Lindsay that there was someone they were all afraid of and that at the youth center, one of the security guards helped him escape—George Turner.

Benson, Halstead and Lindsay go back to the center to pick up Turner for questioning. He tries to run from them, and in the ensuing struggle Lindsay is injured by a passing bicyclist and hospitalized. When she awakes, Voight is at her bedside, vowing to help Teddy and telling her to go back to Chicago. Voight later shows up at SVU and immediately bursts into the interrogation room, where Amaro and Rollins are trying to question Turner. Voight threatens Turner, causing Benson to intervene; she threatens to have Voight arrested if he touches Turner again. However, Benson lets Turner think that she is going to let Voight hurt him in order to scare him into revealing what he knows. Turner tells them some details involving toll fees that their prime suspect had to pay in order to get back into the city. Voight and Benson go to Teddy, who still refuses to remember that part of his life, so they go back to Jocelyn, undercover as Henry's parents in order to get her to talk. They take her back to SVU, where the detectives put her in an interrogation room with Teddy and a live feed of Henry. She remembers that they drove her across a long bridge, that she was blindfolded, and that she heard the sound of tires on metal. She and Teddy also remember a name: Bob Clinton (Mark H. Dold).

The detectives soon learn that Clinton is somewhere on Staten Island, and Benson and Voight rescue Henry and arrest Clinton. Meanwhile, Detectives Amaro and Fin Tutuola (Ice-T) arrest two others that seem to be involved. At the squad room, Rollins comes up with a laptop, showing video of another child who had been abducted by the ring, this time a young girl. Benson and Voight try to lean on Clinton, who asks for full immunity before he divulges anything. Benson decides to lock him up instead.

Hours after Benson sends Clinton to The Tombs, Clinton is shivved in a shower while in protective custody by a Lester Davis, who was awaiting trial on armed robbery. SVU learns that Davis got a phone call from a no-name cell phone purchased in Chicago. Voight was told by Linsday that in Chicago, Andrew Llewellyn (the fire victim who had the child porn photos), and the officer guarding him were shot and killed. Benson comments that their suspect fled back to Chicago.

Production "Chicago Crossover" was written by Law & Order franchise writer Ed Zuckerman (teleplay), SVU executive producer/show runner Warren Leight and Law & Order: SVU creator Dick Wolf, and was directed by Steve Shill. This episode marks the first episode to credit Dick Wolf as a writer since the 100th episode of SVU, "Control", back in the fifth season. In this episode, Raúl Esparza (Assistant District Attorney Rafael Barba) and newcomer Peter Scanavino (Detective Sonny Carisi) were absent.

Concept and writing

In May 2014, NBC President, Robert Greenblatt announced that Chicago P.D., Chicago Fire, and also SVU, could have another crossover episode, after SVU and CPD briefly crossed-over with SVUs fifteenth season's episode, "Comic Perversion" which guest starred Sophia Bush, who portrayed her CPD character, Detective Erin Lindsay; while Ice-T & Kelli Giddish briefly portrayed their characters respectively in the episode "Conventions" of Chicago PD, two episodes which Leight and Olmstead wouldn't call a true 'crossover'.

On September 29, creator Dick Wolf said of the crossover, "Warren Leight and Matt Olmstead are two of the best writers in the business. We wanted to figure out a way to create a crime that connects all three shows. Warren, Matt and I came up with a story that was big and unique enough to transit to all three." SVU showrunner/EP Warren Leight noted the three-show crossover was Wolf's idea, although Leight said that both he and Chicago Fire/PD showrunner/EP Matt Olmstead had their uncertainties about the crossover. Leight admitted, "I think my first reaction was anxiety, I know the fans will like it, but I know how much extra work is involved and also, legitimately these are two different kinds of police shows and I wasn’t sure how the cross-pollination would work."

Olmstead said of crafting the crossover, "What Warren and I did was jump in, I knew what I was going to hand off to him at the end of [Chicago] Fire and he told me what he was going to hand back over to me at PD and then we fine-tuned and figured out the logistics.” Leight explained that each show's writers wrote for their own show and said that he and Olmstead were on the phone a lot for the plotting stages. "We sent the [Chicago PD] script to Warren to vet since he knows the [SVU] characters better than we do," said Olmstead. Leight jumped in, adding, “If there was something I felt was wrong for one of our characters in the PD part, I made my opinions known.” Olmstead assured that it was the same with Leight in writing for the CPD characters: "There was a respectful vetting of both scripts. When I read the SVU script of our characters, it sounded very true, so there weren't any doubts."

Leight and Olmstead, however, worried about having the audience have to tune in to three shows, "That’s a big fear," admits Leight, "But this is still in the Dick Wolf universe where each episode has to stand alone and also link. You don’t want to have a three minute ‘previously on Chicago Fire’ to open up ‘SVU.’ You want that to be as short and clear as possible. Our episode is stand alone yet the baton passes and there are enough unresolved parts for PD to get another hour out of it. That’s an interesting writing challenge – how much to reveal when and how to stage the investigation and the information over 80 minutes. One good thing what we have is that our episode goes right into PD. Our hope that the audience comes and stays for two hours and that we've made it compelling enough for them to do that."