One Chicago & The FBIs Wiki
The Number of Rats
Season: 2
Episode: 20
Original airdate: April 29, 2015
Teleplay by: Matt Olmstead
Cole Maliska
Story by: Matt Olmstead
Warren Leight
Directed by: Nick Gomez
Episode chronology
Previous episode: The Three G's
Next episode: There's My Girl


Benson has traveled into Chicago to help Voight and intelligence with a rape/murder case that is frighteningly similar to a case from New York a decade ago. She calls in Fin and Amaro to assist. The prime suspect, Yates is let go after rigorous questioning. He then requests a meeting with Lindsay and he warns of unintended consequences from what intelligence is doing.


Main Cast

Special Guest Stars

Guest Stars


  • Rachel Melius as Charlotte Reegan
  • Laura Lapidus as Janine
  • Jeff Parker as Doctor Smith
  • Tiffany Bedwell as Victoria Lewyn


Background information and Notes

  • A special opening narration was used for this episode of Law & Order: Special Victims Unit and Chicago P.D.:
In the criminal justice system some killers are so depraved that it takes multiple police agencies to bring them to justice. This is one of those investigations.

Steve Zirnkilton

Episode scene cards

  • This crossover adopted the Law & Order style of using scene cards both for the SVU and Chicago P.D. episodes.
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Chicago P.D. season 2
Episodes Call It MacaroniGet My CigarettesThe Weigh StationChicken, Dynamite, ChainsawAn Honest WomanPrison BallThey'll Have to Go Through MeAssignment of the YearCalled in DeadShouldn't Have Been AloneWe Don't Work Together AnymoreDisco BobA Little Devil ComplexErin's MomWhat Do You DoWhat Puts You on That LedgeSay Her Real NameGet Back to EvenThe Three G'sThe Number of RatsThere's My GirlPush the Pain AwayBorn Into Bad News
Other Seasons Season 1Season 3Season 4Season 5Season 6Season 7Season 8Season 9