The final four episodes for the TNT series are slated to air in 2014, after which Tamaro said she'll stay on as a consultant for season five.
“This is what we all dream of getting to do,” Tamaro said in a statement to THR. “And I got to do it for four phenomenal seasons. I’m at the top of my game, thanks in large part, to this unbelievable experience and show. It’s time to challenge myself and develop new projects. TNT and Warner Horizon have been a dream to work with, and I look forward to doing it again. The heartache for me will be leaving the day-to-day working relationship with an incredible cast and crew.”
A new showrunner hasn't been named.
"Rizzoli & Isles" stars Angie Harmon as Jane Rizzoli and Sasha Alexander as Maura Isles. The series is based on characters created by best-selling author Tess Gerritsen.