What happened to the original SAC Dana Moiser on FBI?

Dana Moiser, the original Special Agent in Charge on the FBI TV show, was replaced by Isobel Castille after just one season.

How long has Agent Stuart Scola been searching for a partner on FBI?

Agent Stuart Scola has been on the hunt for the perfect partner since joining the FBI TV show in season 2, which was over 3 years ago as of November 2025.

Which FBI agents have been on the show since the 2018 premiere?

Agents Maggie Bell, Omar Adom "OA" Zidan, and Jubal Valentine have all been part of the FBI TV series since its debut in 2018.

Home / Arts and Entertainment / Revolving Door at FBI: Agents Come and Go on Hit TV Show

Revolving Door at FBI: Agents Come and Go on Hit TV Show

11 Nov

•

Summary

Original SAC Dana Moiser replaced after one season
Agent Stuart Scola searching for perfect partner since season 2
Agents Maggie Bell, OA Zidan, and Jubal Valentine remain on the show

Revolving Door at FBI: Agents Come and Go on Hit TV Show

The CBS television series FBI has experienced a significant amount of turnover among its special agent characters over the past several years. While Agents Maggie Bell (Missy Peregrym), Omar Adom "OA" Zidan (Zeeko Zaki), and Jubal Valentine (Jeremy Sisto) have been with the show since its 2018 premiere, the original Special Agent in Charge (SAC) Dana Moiser (Sela Ward) only lasted a single season before being replaced by Isobel Castille (Alana De La Garza).

In addition, Agent John Boyd joined the cast during season 2 as Special Agent Stuart Scola, and has been on the hunt for the perfect partner ever since. As Boyd told Us Weekly in January 2025, "It's been interesting to kind of have this phase of being partner-less. We could have a little more speed dating. Someone could drop in. It could be a Cinderella slipper situation. I don't know."