Rizzoli & Isles is a TNT television series starring Angie Harmon as police detective Jane Rizzoli and Sasha Alexander as medical examiner Dr. Maura Isles. The one-hour drama is based on the Rizzoli & Isles series of novels by Tess Gerritsen. It premiered on July 12, 2010. On June 29, 2012, it was renewed for a 16-episode fourth season; and on August 15, 2013, it was renewed for a 15-episode fifth season, which is slated to begin in summer 2014.