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FBI S8E18 — Behavior

8.1

FBI•Season 8•Episode 18

Behavior

8.1/10 · 276 votesApr 20, 202643 min

Ranked #2 of 22 in Season 8•+0.4 vs season avg

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.

Directed byAlex Chapple

Written byEduardo Javier Canto

Previous episodeE17 · Shahadah Next episodeE19 · Fidelity

Seasons9

All 1 2 3 4 5 6 7 8 9

Cast6

Missy Peregrym

Missy Peregrym

Maggie Bell

Zeeko Zaki

Zeeko Zaki

Omar Adom 'OA' Zidan

John Boyd

John Boyd

Stuart Scola

Jeremy Sisto

Jeremy Sisto

Jubal Valentine

Alana de la Garza

Alana de la Garza

Isobel Castille

Juliana Aidén Martinez

Juliana Aidén Martinez

Eva Ramos

Crew2

Alex Chapple

Alex Chapple

Director

E

Eduardo Javier Canto

Writer

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Episode Summary

"Behavior" is episode 18 of FBI season 8. It scored 8.1/10 from 276 votes, ranking #2 of 22 episodes this season (season average 7.7). Directed by Alex Chapple and written by Eduardo Javier Canto, it aired on April 20, 2026.

Next: E19 · Fidelity Best of Season 8