4x1 - Jellyfish Invasion

August 8, 2007

4x2 - Science des chiens

August 15, 2007

4x3 - Ultimate Crocodile

September 12, 2007

4x4 - Science of Babies

September 19, 2007

4x5 - Mammoth Mystery

October 7, 2007

4x6 - Inside the Body Trade

November 11, 2007

4x7 - Ultimate Viper

November 21, 2007

4x8 - China's Secret Mummies

December 2, 2007

In China, archaeologists unearth ancient mummies with European facial features, blond hair and blue eyes. Where did these Caucasians come? Four bodies, a scattering of clues, a mystery whose solution could rewrite history. National Geographic Explorer-in-Residence Spencer Wells, opens an ancient case of missing persons, using the latest advances in DNA technology to determine the origins of a group of enigmatic mummies found in western China. What he learns may change what we know about the world. The four individuals were part of a vanished world that existed in western China between 2600 and 4000 years ago - long before Marco Polo or the Silk Road. Yet these long-buried corpses look European and were found with tools that didn't exist yet in that part of the world. Who were they? Where did they come from? And how might they have affected the spread of culture and technology in prehistoric times?

4x9 - Last Christians of Bethlehem

December 9, 2007

4x10 - Science of Evil

January 9, 2008

4x11 - Testosterone Factor

February 13, 2008

4x12 - Alaska's Last Oil

March 12, 2008

4x13 - Shark Superhighway

April 8, 2008

4x14 - Tunnel to a Lost World

June 3, 2008

4x15 - Bog Mummies

June 4, 2008

4x16 - Science of Cats

June 10, 2008

4x18 - Finding Anastasia

April 29, 2008

Did Romanov Princess Anastasia survive a Bolshevik firing squad or did she and her brother Crown Prince Alexis perish with their father, Tsar Nicholas II, before another firing squad in 1918? The chance find of human remains in a Siberian forest brings forensic anthropologist Dr.Anthony Falsetti to in search of the truth. Marshalling DNA, ballistics and the very latest forensic analysis, an international team works to dispel the greatest myth of the 20th century and tell a real story more remarkable than any fiction.