Season 40
Episodes
1 Secrets of the Viking Sword Oct 10, 2012 
2 Forensics on Trial Oct 17, 2012 
3 Mystery of Easter Island Nov 7, 2012 
4 Ultimate Mars Challenge Nov 14, 2012 
5 Inside the Megastorm Nov 18, 2012 
6 Doomsday Volcanoes Jan 2, 2013 
7 Decoding Neanderthals Jan 9, 2013 
8 Rise of the Drones Jan 23, 2013 
9 Who Killed Lindbergh's Baby? Jan 30, 2013 
10 Building Pharaoh's Chariot Feb 6, 2013 
11 Earth From Space Feb 13, 2013 
12 Mind of a Rampage Killer Feb 20, 2013 
13 Meteor Strike Mar 27, 2013 
14 Ancient Computer Apr 3, 2013 
15 Australia's First 4 Billion Years: Awakening Apr 10, 2013 
16 Australia's First 4 Billion Years: Life Explodes Apr 17, 2013 
17 Australia's First 4 Billion Years: Monsters Apr 24, 2013 
18 Australia's First 4 Billion Years: Strange Creatures May 1, 2013 
19 Manhunt - Boston Bombers May 29, 2013 
20 Oklahoma's Deadliest Tornadoes May 29, 2013