Alan Alda hosts this double feature of spectacular seafaring programs. First, "Into the Deep" follows explorer Bob Ballard into the ocean's depths, where his innovative work holds the promise of transforming the future of science. Next, the 1864 sinking of the American warship Housatonic─the first such successful attack ever mounted─is the subject of "The Uncivilized Engine of War." 60 min. total. Soundtrack: English.