What to Expect from Chicago P.D. Season 13 Episode 4: Root Cause
Imani makes herself more at home on Chicago P.D. Season 13 Episode 4, “Root Cause.” As Voight’s newest protégé, they work on the newest case very closely. Him keeping an eye on her is a good sign that he wants to keep her on the team for the long run.
However, working this closely means Imani is present when a chilling secret from Voight’s past comes back to haunt him.
After the photo of a bruised child is left on Voight’s windshield, Imani begins to ask questions. Will this lead to a case Voight worked on before? Or is this a secret viewers know nothing about?
Meanwhile, the team works together to solve a string of robberies that are putting the streets of Chicago at risk.
Here’s everything you need to know about this episode, including the air date, cast, promo, and how to watch.
Chicago P.D. Season 13 Episode 4 Details
- Title: “Root Cause”
- Air Date: Wednesday, October 22, 2025
- Time: 10:00 PM EST
- Network: NBC
- Writer: Gavin Harris
- Director: Victor Macias
How to Watch Chicago P.D. Season 13 Episode 4
- Live: NBC at 10:00 PM EST
- Streaming: Available next day on Peacock
Chicago P.D. Season 13 Episode 4 Description
A string of violent robberies across the city digs up one family’s secrets; a surprising detail of Voight’s past resurfaces.
Guest Stars & Returning Characters
- Main Cast: Jason Beghe (Hank Voight), Marina Squerciati (Kim Burgess), Patrick John Flueger (Adam Ruzek), Benjamin Levy Aguilar (Dante Torres), LaRoyce Hawkins (Kevin Atwater), Toya Turner (Kiana Cook), Amy Morton (Trudy Platt), and Arienne Mandi (Eva Imani)
Promo & Photos
Check out the photos from Chicago P.D. Season 13 Episode 4:
Promo Video:
What are your hopes for this episode of Chicago P.D.? Share your thoughts with us in the comments below, and be sure to catch up with our review of Chicago P.D. Season 13 Episode 3, “Canaryville,” right here.
Chicago P.D. airs Wednesdays at 10/9c on NBC.
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Lara Rosales
By day, Lara Rosales (she/her) is a solo mom by choice and a bilingual writer with a BA in Latin-American Literature known as a Media Relations Expert. By night, she is a TV enjoyer who used to host a podcast (Cats, Milfs & Lesbian Things). You can find her work published on Eulalie Magazine, Geek Girl Authority, W Spotlight, Collider, USA Wire, Mentors Collective, Instelite, Noodle, Dear Movies, Nicki Swift, and Flip Screened.