A new discovery in the Baltic Sea reveals the story of this lost treasure. The wreckage of the German World War II steamer Karlsruhe may contain the Amber Room. During Operation Hannibal's evacuation (Germany's Dunkirk), Soviet planes bombed and sunk the ship in April 1945.

Archaeologists on land and sea reveal secrets of the infamous Alamo siege. They research the events surrounding the Battle of the Alamo in San Antonio, Texas, one of the most famous sieges in American history. Shipwrecks found in the Gulf of Mexico filled with weapons and new research on the Battle of San Jacinto reveal secrets of the Alamo and tell how Texas, against all odds, secured its independence.