Season 39
Episodes
1 Engineering Ground Zero Sep 7, 2011 
2 Surviving the Tsunami Sep 28, 2011 
3 Finding Life Beyond Earth: Are We Alone? Oct 19, 2011 
4 Iceman Murder Mystery Oct 26, 2011 
5 The Fabric of the Cosmos: What is Space? Nov 2, 2011 
6 The Fabric of the Cosmos: The Illusion of Time Nov 9, 2011 
7 The Fabric of the Cosmos: Quantum Leap Nov 16, 2011 
8 The Fabric of the Cosmos: Universe or Multiverse? Nov 23, 2011 
9 Deadliest Volcanoes Jan 4, 2012 
10 Bombing Hitler's Dams Jan 11, 2012 
11 3D Spies of WWII Jan 18, 2012 
12 Mystery of a Masterpiece Jan 25, 2012 
13 Ice Age Death Trap Feb 1, 2012 
14 Separating Twins Feb 8, 2012 
15 Cracking Your Genetic Code Mar 28, 2012 
16 Hunting the Elements Apr 4, 2012 
17 Deadliest Tornadoes Apr 11, 2012 
18 Why Ships Sink Apr 18, 2012 
19 Secrets of the Sun Apr 25, 2012