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FBI
Air Date: Monday, April 20, 2026
Time Slot: 9:00 PM-10:00 PM EST on CBS
Episode Title: (#FBI818) "Behavior"
[NOTE: The following article is a press release issued by the aforementioned network and/or company. Any errors, typos, etc. are attributed to the original author. The release is reproduced solely for the dissemination of the enclosed information.]

MAGGIE BRINGS IN A CLOSE FRIEND TO HELP THE TEAM PROFILE A SUSPECTED SERIAL KILLER, ON "FBI," MONDAY, APRIL 20

Zach Grenier Guest Stars as Peter Olsen

"Behavior" - When a single mother and her son are abducted while visiting a state park, Maggie brings in Peter Olsen to help profile their suspect. But as the team works, they make a harrowing discovery about an old case, on FBI, Monday, April 20 (9:00-10:00 PM, ET/PT), on the CBS Television Network, and streaming on Paramount+ (live and on-demand for Paramount+ Premium plan subscribers, or on-demand for Paramount+ Essential subscribers the day after the episode airs)*.

WRITTEN BY: Ryan Maldonado & Eduardo Javier Canto

DIRECTED BY: Peter Stebbings







FBI (CBS)
BROADCAST HISTORY:
9/25/18 - ???
STATUS:
currently airing (spring 2026)
TIME SLOT:
mondays from 9:00 PM-10:00 PM EST
CURRENT SEASON:
8 (22 episodes)
VISIT THE OFFICIAL WEB SITE
Missed an episode? Been wanting to catch up? This series is also available on:
ADDITIONAL NOTES:
Seasons 7-9 (2026-27) ordered on 4/9/24
DESCRIPTION:
(from CBS's web site, October 2025) From Emmy Award winner Dick Wolf, FBI is a fast-paced drama about the inner workings of the New York office of the Federal Bureau of Investigation. This elite unit brings to bear all their talents, intellect and technical expertise on major cases in order to keep New York and the country safe. These first-class agents tenaciously investigate cases of tremendous magnitude, including terrorism, organized crime and counterintelligence.
PRINCIPAL CAST INFORMATION:
· Alana De La Garza as Isobel Castille
· Jeremy Sisto as Jubal Valentine
· John Boyd as Stuart Scola
· Lisette Olivera as Syd Ortiz
· Missy Peregrym as Maggie Bell
· Zeeko Zaki as Omar Adom "OA" Zidan
RECURRING/PREVIOUS CAST INFORMATION:
· Connie Nielsen as Ellen Toy (Pilot)
· Ebonée Noel as Kristen Chazal
· Katherine Renee Turner as Tiffany Wallace
· Sela Ward as Dana Mosier
CREW INFORMATION:
· Arthur W. Forney as EP
· Craig Turk as CRTR/EP
· Dick Wolf as CRTR/EP
· Greg Plageman as EP
· Niels Arden Oplev as EP/DIR (Pilot)
· Peter Jankowski as EP
GENRE(S):
· drama
STUDIO INFORMATION:
· CBS Television Studios
· Universal Television
· Wolf Films