The TV show FBI cast is heading into Season 9 with several familiar stars returning and Roland Buck III joining the team as Special Agent Isaiah Green. The CBS crime drama premiered its ninth season on October 5, 2026, bringing a significant change to the working relationships inside the New York field office.
Missy Peregrym remains at the center of the series as Special Agent Maggie Bell. Zeeko Zaki is also back as Special Agent Omar Adom “OA” Zidan, although his character begins the new season in a different professional position.
Jeremy Sisto, Alana De La Garza, John Boyd, and Juliana Aidén Martinez also return. Meanwhile, Buck becomes Maggie’s new partner, giving the long-running procedural a fresh team dynamic.
The Season 9 cast also includes Necar Zadegan in a crossover role as CIA Deputy Chief of Station Nikki Reynard. Her appearance connects the latest FBI season with CBS’s CIA series.
Who is in the FBI Season 9 cast?
The current ensemble combines established members of the New York FBI office with a new field agent.
| Actor | Character | Current status |
|---|---|---|
| Missy Peregrym | Maggie Bell | Returning |
| Zeeko Zaki | OA Zidan | Returning |
| Jeremy Sisto | Jubal Valentine | Returning |
| Alana De La Garza | Isobel Castille | Returning |
| John Boyd | Stuart Scola | Returning |
| Juliana Aidén Martinez | Eva Ramos | Returning |
| Roland Buck III | Isaiah Green | New cast member |
| Necar Zadegan | Nikki Reynard | Guest crossover role |
The lineup keeps most of the show’s established leadership and field agents together. The biggest change comes from the separation of Maggie and OA’s usual partnership.
That change begins immediately in Season 9.
Missy Peregrym returns as Maggie Bell
Missy Peregrym continues her leading role as Maggie Bell.
Maggie has been one of the show’s central agents since its 2018 debut. Her character works major cases for the FBI’s New York office and has developed strong professional relationships throughout the series.
Season 9 places Maggie in a different situation because OA is no longer working beside her in the same capacity.
Instead, Maggie begins working with Isaiah Green, played by Roland Buck III.
The adjustment becomes an important part of the season’s opening story. Maggie and OA have spent years developing trust as partners, so working with a new agent naturally changes the team’s established rhythm.
Maggie’s responsibilities remain focused on FBI investigations, but her new partnership gives Peregrym’s character another professional relationship to develop.
The Season 9 premiere establishes that change from the start.
Zeeko Zaki remains OA Zidan
Zeeko Zaki returns as Special Agent Omar Adom “OA” Zidan.
OA remains an important character in Season 9, but viewers will see him working under very different circumstances.
The end of Season 8 created a major professional setback for OA. His decision to continue pursuing the truth surrounding a dangerous bioweapon investigation put his FBI career in jeopardy.
Season 9 picks up from those developments.
Rather than immediately returning to his former role beside Maggie, OA moves into an undercover assignment. This allows the character to remain part of the series while operating away from the team’s normal structure.
Zaki’s return is particularly significant for viewers who have followed OA since the early seasons.
His relationship with Maggie remains an important part of the show’s character history, but the current season gives both characters separate professional challenges.
OA’s undercover work also creates opportunities for different relationships and investigations as the season progresses.
Jeremy Sisto continues as Jubal Valentine
Jeremy Sisto returns as Assistant Special Agent in Charge Jubal Valentine.
Jubal is one of the senior figures in the New York field office. His responsibilities place him between the agency’s leadership and its field investigators.
He regularly helps coordinate cases and provides direction when agents face complex investigations.
Sisto has played Jubal since the show’s beginning, making him one of the longest-serving members of the current cast.
Season 9 retains his leadership role as the FBI team adjusts to changes involving Maggie and OA.
Jubal also remains one of the characters who helps maintain continuity inside the office. While individual agents move between assignments, his position provides a steady connection between the team’s different investigations.
Alana De La Garza returns as Isobel Castille
Alana De La Garza continues as Special Agent in Charge Isobel Castille.
Isobel oversees the New York field office and serves as one of the highest-ranking figures among the show’s main characters.
Her role involves supervising agents and handling major threats that require the FBI’s attention.
The character has become an important part of the series’ command structure. Isobel frequently works with Jubal while remaining connected to the field agents handling investigations.
De La Garza’s continued presence means Season 9 retains the same leadership structure viewers recognize from previous seasons.
Isobel’s position is especially important when the team faces major cases involving national security and serious criminal threats.
John Boyd remains Stuart Scola
John Boyd returns as Special Agent Stuart Scola.
Scola has been part of the FBI team for several seasons and remains an active investigator in Season 9.
His character has developed close professional relationships within the office, particularly with agents he has worked alongside over the years.
Scola also has an important connection to the CBS expansion surrounding FBI.
The character appears in the Season 2 premiere of CIA, creating a direct crossover between the two shows.
That crossover gives Boyd’s character an opportunity to operate outside the usual FBI setting while maintaining his established identity as an FBI special agent.
For viewers following the current cast, Scola remains a core member of the New York team.
Juliana Aidén Martinez returns as Eva Ramos
Juliana Aidén Martinez continues in the role of Special Agent Eva Ramos.
Eva joined the main cast during Season 8 and remains part of the FBI team for Season 9.
Her character is now an established member of the investigative group rather than a newcomer being introduced to the office.
Eva brings another field agent into the team’s investigations and works alongside the established members of the cast.
Martinez’s return also means Season 9 does not have to rebuild the entire field team after earlier cast departures.
Her presence helps maintain continuity while the writers introduce Isaiah and move OA into an undercover assignment.
Roland Buck III joins as Isaiah Green
Roland Buck III is the most important new addition to the Season 9 cast.
He plays Special Agent Isaiah Green, who becomes Maggie Bell’s new partner.
Isaiah’s arrival changes the working structure that viewers have known for several seasons.
Maggie and OA have traditionally operated as a team. With OA working undercover, Maggie needs another agent beside her.
That responsibility goes to Isaiah.
The Season 9 premiere introduces the new partnership while showing that Maggie must adjust to working with someone who does not have the same history with her that OA does.
Isaiah’s introduction gives the show another established FBI agent without removing one of its major returning characters.
Buck’s casting therefore represents a change rather than a complete replacement.
The actor has also appeared in other television projects, including Chicago Med, and now becomes part of the FBI ensemble.
Necar Zadegan appears as Nikki Reynard
Necar Zadegan joins the Season 9 premiere in a crossover role as Nikki Reynard.
Nikki is a CIA Deputy Chief of Station connected to the events of the new season.
Her appearance links FBI with CIA, the CBS drama that follows FBI in the Monday-night lineup.
The crossover is built into the premiere-night programming. Nikki appears on FBI, while John Boyd’s Stuart Scola crosses into CIA.
This gives viewers a connection between the two shows without changing the identity of the main FBI cast.
Zadegan’s Nikki Reynard is particularly relevant because the current storyline includes intelligence-related elements that require cooperation beyond the FBI’s normal operations.
Her role adds another layer to the Season 9 cast while keeping the focus on the FBI’s New York team.
What changed for Maggie and OA?
The biggest cast-related development in Season 9 involves Maggie and OA.
For years, the two agents have been closely associated as partners. Their professional relationship has been one of the most recognizable elements of the series.
Season 9 changes that arrangement.
OA starts the season working undercover, while Maggie works with Isaiah Green.
The change does not remove either character from the show. Instead, it places them in different professional circumstances.
For Maggie, that means building trust with a new partner.
For OA, it means handling an assignment that requires him to work away from the regular FBI team.
This gives both characters separate storylines while preserving their importance to the series.
The change also allows Roland Buck III to establish Isaiah as a new member of the ensemble.
Is Tiffany Wallace still in the FBI cast?
Katherine Renee Kane’s Tiffany Wallace is not part of the current Season 9 main cast.
Kane departed the series during Season 7 after playing Tiffany for several seasons.
Tiffany became a recognizable member of the New York team and developed a significant professional relationship with Stuart Scola.
Her departure occurred before the current season, so viewers searching for the present cast should not include Tiffany among the Season 9 regulars.
Older online cast lists can still contain former characters because they cover the history of the show rather than its current lineup.
For Season 9, the relevant returning field agents are Maggie, OA, Scola, and Eva, with Isaiah joining the group.
Is Syd Ortiz still part of the cast?
Lisette Olivera’s Syd Ortiz is also not part of the current Season 9 main ensemble.
Syd appeared as a behavioral analyst and FBI agent during Season 7, but she did not become a continuing main cast member.
Season 9 instead features Isaiah Green as the newest major addition to the team.
This distinction is useful for viewers who encounter older cast information while looking for the current lineup.
The present ensemble is centered on the returning stars and Isaiah’s arrival.
How the Season 9 premiere introduces the current lineup
Season 9 began on October 5, 2026, with the episode titled “Rendition.”
The premiere immediately establishes the changes involving the principal characters.
Maggie has to work with Isaiah, while OA adjusts to his new role.
The FBI team investigates the death of a young traveler who witnessed the execution of someone connected to a classified government project.
The investigation brings the team into circumstances involving national security and intelligence operations.
Nikki Reynard’s appearance adds the CIA connection to the premiere.
The episode therefore introduces the current cast structure through the story itself rather than simply resetting the characters between seasons.
The FBI and CIA cast connection
The current season also gives viewers a larger connection between the FBI and CIA casts.
Both shows premiered on CBS on October 5, with FBI airing first at 8 p.m. Eastern and Pacific Time.
CIA follows at 9 p.m. Eastern and Pacific Time.
Necar Zadegan’s Nikki Reynard appears in the FBI Season 9 premiere.
John Boyd’s Stuart Scola appears in the CIA Season 2 premiere.
The two appearances form a two-way crossover between the series.
For FBI viewers, the crossover gives Scola a chance to participate in a story outside the New York field office.
For the CIA series, the appearance establishes a connection with one of CBS’s longest-running current crime dramas.
Current FBI cast roles at a glance
The main Season 9 lineup can be separated into returning agents, office leadership, and the new addition.
Maggie Bell — Missy Peregrym
Maggie remains one of the team’s primary field agents and begins the season with Isaiah Green as her partner.
OA Zidan — Zeeko Zaki
OA returns but starts Season 9 undercover rather than working normally beside Maggie.
Jubal Valentine — Jeremy Sisto
Jubal remains a senior FBI official responsible for helping oversee major investigations.
Isobel Castille — Alana De La Garza
Isobel continues as Special Agent in Charge of the New York field office.
Stuart Scola — John Boyd
Scola remains a field agent and also appears in the CIA crossover.
Eva Ramos — Juliana Aidén Martinez
Eva continues as a member of the FBI investigative team.
Isaiah Green — Roland Buck III
Isaiah is the newest major member of the team and Maggie’s new partner.
Nikki Reynard — Necar Zadegan
Nikki is a CIA official whose appearance connects the Season 9 premiere with CIA.
Why the current cast matters in Season 9
Season 9 keeps the show’s central cast recognizable while changing how several characters interact.
Maggie remains in the field, but she no longer has OA as her regular partner at the beginning of the season.
OA remains part of the story, but his undercover assignment gives him a separate path.
Isaiah fills the partner role alongside Maggie, making Roland Buck III an important new presence.
Jubal and Isobel continue to provide leadership, while Scola and Eva remain active investigators.
That balance allows the series to introduce a new character without removing its established stars.
The current cast also gives the show room to develop stories across different parts of the FBI operation.
Some characters can focus on field investigations, while others handle leadership responsibilities or specialized assignments.
What viewers should know about the Season 9 cast
The most important point is that Season 9 is not a complete cast overhaul.
Most of the familiar stars remain.
Missy Peregrym, Zeeko Zaki, Jeremy Sisto, Alana De La Garza, John Boyd, and Juliana Aidén Martinez are all back.
The major addition is Roland Buck III as Isaiah Green.
The biggest character change involves OA’s professional status and Maggie’s new partnership.
Necar Zadegan’s appearance as Nikki Reynard adds another notable development because it brings a CIA character into the FBI storyline.
Former performers such as Katherine Renee Kane and Lisette Olivera should not be counted among the current Season 9 regulars.
The result is a cast that preserves the show’s established identity while giving the new season a different internal structure.
Frequently Asked Questions
Who is in the FBI Season 9 cast?
The main Season 9 cast includes Missy Peregrym, Zeeko Zaki, Jeremy Sisto, Alana De La Garza, John Boyd, Juliana Aidén Martinez, and Roland Buck III.
Who plays Maggie Bell?
Missy Peregrym plays Special Agent Maggie Bell.
Who plays OA Zidan?
Zeeko Zaki plays Special Agent Omar Adom “OA” Zidan.
Is OA still on FBI Season 9?
Yes. Zeeko Zaki remains in the cast, although OA begins Season 9 working undercover.
Who is Maggie’s new partner?
Roland Buck III plays Special Agent Isaiah Green, Maggie’s new partner in Season 9.
Who plays Jubal Valentine?
Jeremy Sisto plays Assistant Special Agent in Charge Jubal Valentine.
Who plays Isobel Castille?
Alana De La Garza plays Special Agent in Charge Isobel Castille.
Who plays Stuart Scola?
John Boyd plays Special Agent Stuart Scola.
Who plays Eva Ramos?
Juliana Aidén Martinez plays Special Agent Eva Ramos.
Is Katherine Renee Kane in Season 9?
No. Katherine Renee Kane’s Tiffany Wallace is not part of the current Season 9 main cast.
Is Lisette Olivera returning as Syd Ortiz?
Syd Ortiz is not part of the current Season 9 main cast.
Who is Nikki Reynard?
Necar Zadegan plays Nikki Reynard, a CIA Deputy Chief of Station who appears in the Season 9 premiere.
When did Season 9 premiere?
Season 9 premiered on CBS on Monday, October 5, 2026.
What time does FBI air?
The series airs Mondays at 8 p.m. Eastern and Pacific Time on CBS.
Does Scola appear in CIA?
Yes. John Boyd’s Stuart Scola appears in the Season 2 premiere of CIA as part of the crossover between the two CBS dramas.
Season 9 keeps the familiar faces that have defined the series while giving the team a new professional arrangement. Maggie has Isaiah beside her, OA takes on an undercover role, and the remaining agents continue their work from the New York field office.
Which member of the current FBI cast stands out most to you in Season 9? Share your thoughts and keep checking for confirmed updates as the season continues.