Season 38 aired between 11 Jan 2011 and 23 Nov 2011, 18 episodes.
Episodes
E01
Deadliest Earthquakes
11 Jan 2011
E02
Making Stuff Stronger (1)
19 Jan 2011
E03
Making Stuff Smaller (2)
26 Jan 2011
E04
Making Stuff Cleaner (3)
02 Feb 2011
E05
Making Stuff Smarter (4)
09 Feb 2011
E06
Smartest Machine on Earth
09 Feb 2011
E07
Crash of Flight 447
16 Feb 2011
E08
Venom: Nature's Killer
23 Feb 2011
E09
Japan's Killer Quake
30 Mar 2011
E10
Power Surge
20 Apr 2011
E11
Engineering Ground Zero
07 Sep 2011
E12
Surviving the Tsunami
28 Sep 2011
E13
Finding Life Beyond Earth
19 Oct 2011
E14
Iceman Murder Mystery
26 Oct 2011
E15
The Fabric of the Cosmos: What is Space? (1)
02 Nov 2011
E16
The Fabric of the Cosmos: The Illusion of Time (2)
09 Nov 2011
E17
The Fabric of the Cosmos: Quantum Leap (3)
16 Nov 2011
E18
The Fabric of the Cosmos: Universe or Multiverse? (4)
23 Nov 2011