The cable network previously announced it had renewed the show "Falling Skies" for a fourth season.
"TNT has had a terrific summer with four big hits that have drawn viewers with great storytelling, engaging characters and outstanding performances," Michael Wright, president and head of programming for TNT, TBS and Turner Classic Movies, said in a statement Thursday. "With the renewals of 'Rizzoli & Isles,' 'Major Crimes,' 'Falling Skies' and 'Perception,' TNT has built an incredibly strong arsenal of scripted series. And it's only going to get stronger with the addition of 'Mob City' and the return of 'Dallas' this winter, not to mention the debuts of 'The Last Ship' and 'Legends' next summer."
"Rizzoli & Isles" will be back for a fifth season, while "Major Crimes" and "Perception" will return for third seasons.