The fourth season of the American police procedural television series FBI premiered on September 21, 2021, on CBS, for the 2021âÂÂ22 television season, and ended on May 17, 2022. The season premiered with a crossover event with ' and new spin-off series '.
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.
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. <onlyinclude></onlyinclude>
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 was on maternity leave.
The season finale, "Prodigal Son," was delayed from its original broadcast date due to the Robb Elementary School shooting that occurred the same day that the episode was scheduled to be broadcast. While the episode aired in the middle of Season 5 on , the show's production code designated it as Season 4, not Season 5.
The fourth season premiered on September 21, 2021. It aired on Tuesdays at 8:00 p.m. with its spin-off series ' and '.