FBI season 4

The fourth season of the American police procedural television series FBI premiered on September 21, 2021, on CBS, for the 2021–22 television season, and ended on May 17, 2022. The season premiered with a crossover event with FBI: Most Wanted and new spin-off series FBI: International.

FBI centers on inner workings of the New York office criminal division of the Federal Bureau of Investigation (FBI). The series features an ensemble cast including Missy Peregrym, Zeeko Zaki, Jeremy Sisto, Alana de la Garza, John Boyd and Katherine Renee Turner. The season consisted of 21 episodes.

Main

 * Missy Peregrym as Maggie Bell, FBI Special Agent.
 * Zeeko Zaki as Omar Adom "OA" Zidan, FBI Special Agent and Maggie's partner.
 * Jeremy Sisto as Jubal Valentine, FBI Assistant Special Agent-In-Charge (ASAC), who runs the office's fusion center.
 * Alana de la Garza as Special Agent-in-Charge (SAC) Isobel Castille, the team's supervisor.
 * John Boyd as Stuart Scola, FBI Special Agent and Tiffany's field partner.
 * Katherine Renee Kane as Tiffany Wallace, FBI Special Agent and a former NYPD officer and White Collar Division agent.

Recurring

 * James Chen as Ian Lim, an FBI Technical Analyst.
 * Thomas Phillip O'Neil as Dr. Neil Mosbach, an FBI Medical Examiner.
 * Taylor Anthony Miller as Kelly Moran, an FBI Analyst.
 * Roshawn Franklin as Trevor Hobbs, an FBI Special Agent and an Intelligence Analyst.
 * Vedette Lim as Elise Taylor, an FBI intelligence analyst.
 * David Zayas as Antonio Vargas, the most notorious drug lord in the world and leader of the Durango Cartel.
 * Kathleen Munroe as Rina Trenholm, FBI's Assistant Director in charge of the New York Field Office.
 * Piter Marek as Rashid Bashir, FBI Special Agent In Charge of Counterterrorism.
 * Shantel VanSanten as Nina Chase, an FBI Special Agent.

Crossover

 * Julian McMahon as Jess LaCroix, FBI Supervisory Special Agent (SSA) and Team leader of the Fugitive Task Force.
 * Kellan Lutz as Kenny Crosby, FBI Special Agent in the Fugitive Task Force.

Episodes
The number in the "No. overall" column refers to the episode's number within the overall series, whereas the number in the "No. in season" column refers to the episode's number within this particular season. "U.S. viewers (millions)" refers to the number of viewers in the U.S. in millions who watched the episode as it was aired.

Production
On March 24, 2021, CBS renewed FBI for a fourth season. On April 20, 2022, it was announced that Shantel VanSanten would return as Special Agent Nina Chase in a recurring role, while Peregrym went inactive for her maternity leave.

Removed episode
The original season finale, "Prodigal Son" was set as the 22 episode of the season. However, the episode had to be pulled from its planned airing on May 24, 2022 due to the Robb Elementary School shooting that occurred the same day that the episode was supposed to air. As a result, episode 21 "Kayla" became the unofficial season finale.

Release
The fourth season premiered on September 21, 2021. It aired on Tuesdays at 8:00 p.m. with its spin-off series FBI: Most Wanted and FBI: International.