Season 18 aired between 03 Oct 2011 and 20 Feb 2012, 16 episodes.
Episodes
E01
Inside Your Walls
03 Oct 2011
E02
Built by Hand
10 Oct 2011
E03
Swamp Tech
24 Oct 2011
E04
Pocket Tools
07 Nov 2011
E05
Food Trucks
14 Nov 2011
E06
Weird Machines
28 Nov 2011
E07
More Candy
05 Dec 2011
E08
Battle Ready
19 Dec 2011
E09
Stink
26 Dec 2011
E10
Waterproof
02 Jan 2012
E11
Wood
09 Jan 2012
E12
Convenience Stores
16 Jan 2012
E13
Tiny Weapons
23 Jan 2012
E14
Under Pressure
30 Jan 2012
E15
Shoes
06 Feb 2012
E16
Alaska
20 Feb 2012