Katherine Renee Kane is set to leave CBS's 'FBI' after Season 7, where she has played Special Agent Tiffany Wallace since Season 3. Despite her departure, she will appear in at least one episode during the upcoming season, which premieres on October 15. The specific reason for her exit remains undisclosed. Joining the cast in Season 7 is Lisette Olivera, who will portray Syd, a Behavioral Analysis Unit agent stepping into the role of Special Agent Scola's new partner. The show has also seen a change in leadership, with Mike Weiss taking over as showrunner from Rick Eid. The 'FBI' franchise, including its spinoffs, continues to thrive with a three-season renewal from CBS.