Season 25
Episodes
1 The Bog Bodies Jan 20, 2006 2 The Battle of the River Plate Jan 27, 2006 3 The Floating Brothel Feb 3, 2006 4 The Unknown Soldiers Feb 24, 2006 5 Missing in Action Mar 3, 2006 
6 The Secret History of Genghis Khan Mar 10, 2006 7 The Crusaders' Lost Fort Apr 14, 2006 8 Mystery of the Headless Romans Apr 21, 2006 9 Battle for Warsaw Apr 28, 2006 10 The Iron Coffin May 5, 2006 11 San Francisco's Great Quake May 12, 2006 
12 The Princess Spy May 19, 2006
6 The Secret History of Genghis Khan Mar 10, 2006 7 The Crusaders' Lost Fort Apr 14, 2006 8 Mystery of the Headless Romans Apr 21, 2006 9 Battle for Warsaw Apr 28, 2006 10 The Iron Coffin May 5, 2006 11 San Francisco's Great Quake May 12, 2006 12 The Princess Spy May 19, 2006