FBI's Isobel Castille has been tested over the past two seasons - first with her near-death experience during the season 7 finale and now a possible season 8 job shakeup that could take her away from her team. During the Monday, December 1, episode of the CBS series, fans learned whether SAC Isobel (Alana De La Garza) took the ADAC promotion and who she named as her successor. But will the answer mean peace for the New York City FBI team? Warning: Spoilers below from FBI season 8, episode 7.