Season 4

1. Mummies of the Clouds

September 3, 2007 · 1h

500 years before the Inca, a band of warriors called the Chachapoya built the greatest stone monument in the Americas. It's three times the size of Egypt's largest pyramid, yet they disappeared without a trace.

2. The Hunley: New Revelations

September 10, 2007 · 1h

The Confederate Army, in an attempt to turn the tide of the Civil War, launched a new and daring weapon--a forty-foot submarine. The H.L. Hunley, armed with a primitive torpedo, destroyed a mighty Union warship, yet its crew never made it home.

3. Kings of the Stone Age

September 17, 2007 · 1h

The giant stone heads of the Olmec have amazed and mystified archaeologists for more than 150 years.

4. Pirates: Terror in the Mediterranean

September 24, 2007 · 1h

In a new expedition, Kara Cooney and Charles Ingram look for evidence of the Barbary Pirates at the bottom of the Mediterranean Sea.

5. God's Gold (1)

October 1, 2007 · 1h

Join the search for golden artifacts from Jerusalem's Temple, stolen by the Romans 2,000 years ago.

6. God's Gold (2)

October 15, 2007 · 1h

The search for the treasure of the Temple continues.

7. Timbuktu

October 22, 2007 · 1h

For centuries, Europeans heard legends of a mythical city in the heart of the Sahara, the source of endless caravans of gold, but it took 500 years to find.

8. Angkor Wat: The Eighth Wonder

October 29, 2007 · 1h

Travel deep into the heart of the Cambodian jungle to discover a magnificent stone temple that was built on a scale unparalleled in human history.