The CBS show FBI is known for its intense cases, and Season 8 Episode 18 is no different. This episode, titled “Behavior,” aired on April 20, 2026. It focuses on a very personal and dark investigation for Special Agent Maggie Bell. The episode brings in a special guest star to help catch a dangerous criminal.
The story follows the abduction of a mother and her young son from a state park. The team quickly realizes they are dealing with a complicated suspect. To understand the criminal’s mind, Maggie asks for help from an old friend who is an expert in profiling. The episode takes a dark turn when the team finds a shocking link to an old case.
Main Cast and Characters in Episode 18
The regular team is back for this episode, working together to solve the case. Here are the main faces you see on screen.
- Missy Peregrym as Special Agent Maggie Bell: She leads the investigation. Maggie brings in a profiler to help because the case is very disturbing. She uses her past experiences to get into the mind of the suspect.
- Zeeko Zaki as Special Agent Omar Adom “OA” Zidan: He is Maggie’s partner. OA works closely with her on the ground to find the missing family.
- Jeremy Sisto as Assistant Special Agent in Charge Jubal Valentine: Jubal runs the command center. He coordinates the agents in the field and manages the pressure from higher-ups.
- Alana De La Garza as Special Agent in Charge Isobel Castille: She is the top boss in the New York office. Isobel provides the strategic oversight for the major case.
- John Boyd as Special Agent Stuart Scola: Scola helps with the fieldwork. He follows leads and assists in the physical search for the victims.
- Katherine Renee Kane as Special Agent Tiffany Wallace: She is part of the fieldwork team. Tiffany works alongside the others to gather evidence and track down the abductor.
- Juliana Aidén Martinez as Special Agent Eva Ramos: Ramos is a newer member of the team. She assists in the investigation and has a tense moment with a potential suspect during the episode.
Supporting and Recurring Cast
The main agents get help from a reliable group of analysts. These behind-the-scenes players are crucial for finding information.
- Vedette Lim as Elise Taylor: She is the tech analyst. Elise uses computers to dig up data and trace digital footprints to help the agents find the suspect.
- Taylor Anthony Miller as Kelly Moran: He is another analyst. Kelly provides the team with intelligence and support from the office.
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Special Guest Star in FBI Season 8 Episode 18
This episode features a very important guest role. Maggie cannot solve this case alone.
- Zach Grenier as Peter Olsen: He is a behavioral profiler and an old friend of Maggie’s. Maggie asks him to join the team to build a profile of the kidnapper. His skills help the team understand who they are looking for.
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.
Episode Details and How to Watch
If you missed the live show, you can still watch it. The episode originally aired on Monday, April 20, 2026, at 9:00 PM ET/PT on CBS.
Streaming details for global audiences:
- USA: You can stream the episode on Paramount+. If you have the Premium plan, you can watch it live or on demand. If you have the Essential plan, you can watch it the day after it airs.
- United Kingdom: The episode will likely be available on Sky Max and streaming service NOW at a later date.
- Canada: Viewers can watch on Global TV or stream on StackTV.
- Australia: The episode will be available on Network 10 or streaming on Paramount+ Australia.
- India: The episode airs on Colors Infinity and is available on Voot Select (now JioCinema) with a delay.
The episode was written by Ryan Maldonado and Eduardo Javier Canto, and directed by Peter Stebbings.
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