Titanic is one of the top grossing movies of all time. Apart from the love story, most of the background events are accurate – with great attention to detail. But the culmination of a three year research project has revealed a new discovery.  Another ship steamed to within five miles of the stricken liner and could have saved all aboard. Instead, on the orders of its fearful captain, it turned back, leaving the passengers to drown. Survivors of the wreck recalled seeing a "mystery ship" which refused to come to their aid. For decades the wrong man, Captain Stanley Lord of the Californian, bore the blame. Now, for the first time on television, we set the record straight, cross-referencing eye witness testimony from 1912, with Bob Ballard's discovery of where the Titanic sank. We draw on archive footage, and present an astonishing voice recording that Captain Lord made in 1961, in which he reveals the identity of the man who abandoned the drowning passengers.