SVU and Chicago PD officer Erin Lindsay try to track down Lindsay's half-brother, who may be able to help take down a child pornography ring.

The crossover starts on Chicago Fire S03E07 Nobody Touches Anything (I). It continues on Chicago P.D. S02E07 They'll Have to Go Through Me (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).

Chicago P.D. detectives Lindsay and Dawson join the SVU in the hunt for two escaped murderers they helped to convict.

The crossover continues on Chicago P.D. S03E14 The Song of Gregory Williams Yates (II).