Season 4

Episode Guide

The FBIs Crossover: FBI - All That Glitters (Part 1), FBI: Most Wanted - Exposed (Part 2) and FBI: International - Pilot (Part 3)

S4 E0
Sep 21, 2021
All That Glitters (Part 1): After a young woman is killed on her way home from a lavish yacht party, the team investigates who she was and how she came to be at the event, which was attended by some of the most influential people in the world. Also, Maggie brings Crosby (Kellan Lutz, FBI: MOST WANTED) into the investigation after a murder suspect is identified as a veteran who had been on several Army operations with Crosby, in the first part of a special three-part crossover event and the fourth season premiere of FBI. Exposed (Part 2): A local FBI case involving two murdered women and a sea of powerful men turns into a manhunt for the dangerous leader of a far-reaching criminal enterprise, in the second part of a special three-part crossover event and the third season premiere of FBI: MOST WANTED OA (Zeeko Zaki, FBI) assists Jess and the team, joined by special agent Kristin Gaines (Alexa Davalos, FBI: MOST WANTED). Pilot (Part 3): Special Agent Scott Forrester and his Budapest-based FBI fly team head to Croatia, after Isobel Castille (Alana De La Garza, FBI) enlists their help to capture an American fugitive who escaped to Zagreb with a 14-year-old girl. OA (Zeeko Zaki, FBI) continues with the mission overseas, intent on bringing the fugitive to justice, while Europol agent Katrin Jaeger attempts to help the team secure the necessary support and access from the less-than-cooperative local authorities, in the conclusion of a special three-part crossover event, and the series premiere of FBI: INTERNATIONAL.

All That Glitters (Part 1)

S4 E1
Sep 21, 2021
After a young woman is killed on her way home from a lavish yacht party, the team investigates who she was and how she came to be at the event, which was attended by some of the most influential people in the world. Also, Maggie brings Crosby (Kellan Lutz, FBI: MOST WANTED) into the investigation after a murder suspect is identified as a veteran who had been on several Army operations with Crosby, in the first part of a special three-part crossover event and the fourth season premiere of FBI, Tuesday, Sept. 21 (8:00-9:00 PM, ET/PT) on the CBS Television Network, and available to stream live and on demand on Paramount+.

Hacktivist

S4 E2
Sep 28, 2021
Maggie, OA and the team must stop a hacker who is disabling life-saving equipment in several New York City hospitals, while demanding a full investigation into the recently deceased patients of a local psychiatric facility. With Jubal's son waiting for important surgery at one of the impacted hospitals, Jubal's adamant about remaining involved in the case despite Isobel's reservations.

Trauma

S4 E3
Oct 05, 2021
After the team finds a connection between bombings at government agencies and a private veterans' club in New York City, Isobel tells OA to recruit his former Army buddy, Chris (Cleveland Berto), for intel since he spends time at the club. However, knowing the difficulty soldiers like Chris often face returning to civilian life, OA is reluctant to follow orders.

Know Thyself

S4 E4
Oct 12, 2021
The team hunts for a serial killer who is targeting young, homeless men. Also, Tiffany and Scola don't see eye to eye on how to handle the case or the difference between partners and co-workers.

Charlotte's Web

S4 E5
Nov 02, 2021
After a suburban woman is kidnapped from her home, the team looks into trysts on both sides of a seemingly perfect marriage. Also, OA feels pressure from Mona to make changes in his career path.

Allegiance

S4 E6
Nov 09, 2021
The team must track down a shooter targeting detectives from the same precinct and unit, while facing mounting tension from the NYPD. Also, Tiffany finds that her NYPD roots may be influencing her view of the situation.

Gone Baby Gone

S4 E7
Nov 16, 2021
After a young girl is kidnapped from her daycare, the team must help her parents navigate a debt owed to the deadly gang in their neighborhood. Also, Maggie struggles to focus on the case when her sister, Erin, returns from rehab.

Fire and Rain

S4 E8
Dec 07, 2021
The team attempts to extract key information from a vulnerable 9/11 widow, Hannah Thompson (Janel Moloney), who is shocked that her new "boyfriend" is the manipulative leader of a terrorist group planning an attack. Also, Scola is reminded of his brother's death on 9/11, and Tiffany worries about his emotional choices during the investigation.

Unfinished Business

S4 E9
Dec 14, 2021
After Rina is critically wounded while heading to work with Jubal; the team makes the chilling discovery that a vengeful Vargas orchestrated the shooting from behind bars and continues to target the rest of their team and their loved ones.

Fostered

S4 E10
Jan 04, 2022
As the team investigates a string of jewelry store robberies that culminate in a double murder, they uncover a connection to a 16-year-old boy trying to survive the foster care system.

Grief

S4 E11
Jan 11, 2022
As the team searches for an abducted college co-ed, Jubal becomes intent on obtaining lifesaving leads from the father of the abductor's previous victim.

Under Pressure

S4 E12
Feb 01, 2022
Maggie goes undercover working in a bar to investigate an anti-government group that regularly gathers there and has several members suspected in a series of bombings.

Pride and Prejudice

S4 E13
Feb 22, 2022
When a Muslim college student and his younger brother are murdered, the team connects with the outraged imam of OA's former mosque, who insists the victims were wrongly targeted as terrorists.

Ambition

S4 E14
Mar 07, 2022
The team rushes to investigate an extremist gun group after an anti-gun lobbyist building is bombed, with the promise of others to follow.

Scar Tissue

S4 E15
Mar 21, 2022
The team realizes they have a cross-country serial killer on their hands, after another body is found bound with the same sophisticated knot as their local victim.

Protective Details

S4 E16
Mar 28, 2022
After an ICE agent is fatally shot at an ICE vs. DEA hockey game, the team attempts to find the shooter who they believe may also be targeting Congressman Curtis Grange, who was at the same game.

One Night Stand

S4 E17
Apr 12, 2022
When a young couple is found murdered in a New York City park after returning from vacation, the team searches for a suspect linked to the drug trade. Also, Scola turns over a new leaf when it comes to his relationships.

Fear Nothing

S4 E18
Apr 19, 2022
OA is forced to confront one of his biggest fears when the team discovers that deadly sarin gas may have been sold to terrorists.

Face Off

S4 E19
Apr 26, 2022
When a morning show host is murdered inside her home, the team tracks the killer, who they realize is targeting powerful women.

Ghost from the Past

S4 E20
May 10, 2022
The murder of a TSA agent leads the team to hunt down a killer who is using drug mules to exploit airport security checkpoints.

Kayla

S4 E21
May 16, 2022
When a retired DEA agent is shot outside a bakery, the team works to determine if the victim's past cases or current bouncer job are connected to the murder.