The Last Ship was already renewed for Season 4 in July, so this is actually more of an extension than a renewal.
The Last Ship’s Season 3 finale airs Sunday, Sept. 11 at 9/8c on TNT.
The Last Ship will sail until at least 2018.
The Last Ship follows the crew of the U.S.S. Nathan James, who are among the few survivors of a global catastrophe that wiped out most of the world’s population.