Secrets of the Dead - Season 13

Fifty years after the tragic shooting of President John F. Kennedy, Secrets of the Dead chronicles minute-by-minute the assassination as it was revealed in the CBS newsroom from the moment the President was shot until Walter Cronkite's emotional pronouncement of his death, one hour and eight minutes later.

New forensic technology helps researchers study Dr. David Livingstone's unpublished and long-lost field diary, which reveals he witnessed the brutal massacre of slaves by their traders. The writings in this diary suggest Livingstone was far different from the legend that surrounds him.

146 B.C.: Carthage, the proud capital of the vast Carthaginian Empire, is ablaze. Marauding Romans are mercilessly slaughtering and pillaging. Any survivors face a terrifying fate as slaves on Roman galleys or in their quarries.

Escaping the bloody carnage is impossible...or is it? Could some of the once-mighty Carthaginians have got away? And even more incredibly – could they have turned west on an epic journey across the vast Atlantic Ocean to new shores? Did they set foot in South America, long before Columbus ever walked the face of the Earth? Ancient documents suggest there was a Carthaginian getaway, and modern science has found evidence to support these extraordinary claims.

Where the Hanging Gardens of Babylon were located, what they looked like and how they were constructed.

Of the Seven Wonders of the Ancient World, the Hanging Garden of Babylon is the most elusive of these constructions of classical antiquity. While traces have been found of the Great Pyramid of Gaza, the Temple of Artemis at Ephesus, the Statue of Zeus at Olympia, the Mausoleum of Halicarnassus, the Colossus of Rhodes and the Lighthouse of Alexandria, centuries of digging have turned up nothing about the lost gardens of Babylon – until now.

Why, in the nearly 3,000 years since the gardens were presumably built, has no archeological evidence ever been found to support their existence? Is the Hanging Garden of Babylon a myth or a mystery to be solved?

Oxford academic Stephanie Dalley has decoded an ancient, long-overlooked text in the British Museum and now believes that the gardens were built by another man, in another time, in another location. She travels to war-torn northern Iraq to gather evidence to support her controversial new theory and try to solve this ancient mystery.

Discover a portrait of a younger and more beautiful Mona Lisa that predated the famous Louvre masterpiece. In September 2012, headline news shook the art world. A secret da Vinci had been uncovered, a portrait of a younger and more beautiful Mona Lisa that predated the famous Louvre masterpiece. Now an elite group of art historians, research physicists, restoration experts and forensic imaging specialists have gained exclusive access to analyze the painting first hand. Applying high-precision, scientific techniques they will aim to verify the painting's date, decipher hidden mathematical codes within it, and unravel the clues that point to da Vinci's genuine hand.

With the exception of the nightly network news shows, no one on television devoted more airtime to Watergate than talk show host Cavett. From 1972 to 1974, America watched the Watergate scandal unfold on "The Dick Cavett Show" as Cavett interviewed nearly every major Watergate figure — on both sides of the crisis — including John Ehrlichman, Alexander Haig, G. Gordon Liddy, Jeb Magruder and members of the Senate Watergate Committee: Senators Howard Baker, Daniel Inouye, Herman Talmadge, Lowell Weicker, and more.

Unfolding through interviews with people who were directly involved, "Dick Cavett's Watergate" documents the critical Watergate milestones with new insight and perspective. New interviews with Cavett offer personal insights into the key Watergate personalities and provide historical context for the featured clips. On a more intimate note, Cavett reveals his reaction on discovering he was mentioned in the White House tapes — not once, but 26 times.

Scientists test the bones of England's fierce king Richard III.