One Chicago & The FBIs Wiki
Know Thyself
Season: 4
Episode: 4
Original airdate: October 12, 2021
Teleplay by: Joe Halpin
Story by: Jen Frosch
Directed by: Tim Busfield
Episode chronology
Previous episode: Trauma
Next episode: Charlotte's Web


The team hunts for a serial killer who is targeting young, homeless men. Also, Tiffany and Scola don't see eye to eye on how to handle the case or the difference between partners and co-workers.


Main Cast

Guest Stars


  • Chaundre Hall-Broomfield as Greg Robinson
  • Darius Wright as Rob Holden
  • Marcus Gladney Jr. as Phillip "Crabtree" Johnson
  • Joe Giorgio as Detective Beck
  • William Franke as Sergeant Mitchell
  • Amanda Bruton as Cart Owner
  • Gina Naomi Baez as NYPD Uniform
  • Darius Aushay as Victim


  • Dick Wolf as Creator
  • Craig Turk as Creator
  • Dick Wolf as Executive Producer
  • Rick Eid as Executive Producer
  • Alex Chapple as Executive Producer
  • Arthur W. Forney as Executive Producer
  • Peter Jankowski as Executive Producer
  • Joe Halpin as Co-Executive Producer
  • Keith Eisner as Co-Executive Producer
  • Zach Calig as Supervising Producer
  • Anastasia Puglisi as Supervising Producer
  • Amanda Slater as Producer
  • Joe Webb as Producer
  • Alec Chorches as Producer
  • Rachel Cates as Co-Producer
  • Claire DeMorest as Co-Producer
  • Kristy Lowrey as Co-Producer
  • Jonathan Strauss as Co-Producer
  • Bart Tau as Director Of Photography
  • Malchus Janocko as Production Designer
  • Etienne des Lauriers as Editor
  • Atli Örvarsson as Music
  • Jonathan Strauss as Casting
  • Heather Michaels as Story Editor

Background information and Notes


FBI season 4
Episodes All That GlittersHacktivistTraumaKnow ThyselfCharlotte's WebAllegianceGone Baby GoneFire and RainUnfinished BusinessFosteredGriefUnder Pressure
Other Seasons Season 1Season 2Season 3