FBI Season 4, Episode 9 Unfinished Business Crime Drama IMDB 7.911 Country United States Duration 43 min Air Date 2021-12-14 Actors Missy Peregrym (Maggie Bell) Zeeko Zaki (Omar Adom 'OA' Zidan) John Boyd (Stuart Scola) Katherine Renee Kane (Tiffany Wallace) Shantel VanSanten (Nina Chase) Jeremy Sisto (Jubal Valentine) Alana de la Garza (Isobel Castille) Overview 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.