First, watch this trailer. Then, read on for some background on how a fictional destroyer will try to save the world next year: [youtube]http://www.youtube.com/watch?v=2Vng00SYRL0[/youtube] Wedged between signature special effects from Michael ( “Transformers”) Bay and close-ups of Capt. Tom Chandler (Eric “Dr. McSteamy” Dane) is the plot of “The Last Ship,” based loosely on the 1989 William Brinkley novel of the same name. In the TV version, which will air on TNT in the summer of 2014, the destroyer Nathan James ends four months of radio silence off Antarctica only to find out the world’s been ravaged by a global…