Season 38
Episodes
1 Building the Great Cathedrals Oct 19, 2010 
2 Emergency Mine Rescue Oct 26, 2010 
3 Trapped in an Elevator Nov 2, 2010 
4 Dogs Decoded Nov 9, 2010 
5 Secrets of Stonehenge Nov 16, 2010 
6 Quest for Solomon's Mines Nov 23, 2010 
7 Secrets Beneath the Ice Dec 28, 2010 
8 Deadliest Earthquakes Jan 11, 2011 
9 Making Stuff: Stronger Jan 19, 2011 
10 Making Stuff: Smaller Jan 26, 2011 
11 Making Stuff: Cleaner Feb 2, 2011 
12 Making Stuff: Smarter Feb 9, 2011 
13 Smartest Machine on Earth Feb 9, 2011 
14 Crash of Flight 447 Feb 16, 2011 
15 Venom: Nature's Killer Feb 23, 2011 
16 Japan's Killer Quake Mar 30, 2011 
17 Power Surge Apr 20, 2011 
18 How Smart Are Animals? Feb 9, 2011