Voight and Antonio enlist the help of agents at the Special Victims Unit in New York, Fin and Rollins, to help track down the culprit of a series of rape/murders. Burgess has an opportunity to prove herself to Intelligence. Elsewhere Lindsay enlists the help of Halstead to act as her date for her high school reunion to get back at an old rival.

The crossover starts on Law & Order: Special Victims Unit S15E15 Comic Perversion (I).

Popular comedian Josh Galloway is faced with student protestors after a set at Tompkins Square University. Though Barba can’t arrest him for speaking his mind, he charges the SVU to find proof that Galloway’s actions reflect his words. Meanwhile, a detective from Chicago seeks help from the NYPD.

The crossover continues on Chicago P.D. S1E06 Conventions (II).

The Cerritos crew unexpectedly spends a day on Deep Space Nine.

Mariner and Boimler work the Starfleet recruitment booth at an alien job fair, Rutherford challenges himself.

After a slew of brutal slayings, District 21, led by Sergeant Hank Voight go after a Columbian drug cartel cleaning house in Chicago. They discover D’Anthony who proves to be an asset in the investigation. At District, complicated histories and unit rivalries surface which could end up costing them one of their own. Meanwhile, Rookie Kyle Ruzek is pulled from the police academy by Olinski to join the team.

On a remote science outpost, stone orbs are bringing fantasies to life. Tendi starts her first day as a Senior Science Officer Trainee.