Season 4 aired between 11 Apr 2010 and 22 Aug 2010, 18 episodes.
Episodes
E01
Collateral Damage
11 Apr 2010
E02
Scars & Stripes
18 Apr 2010
E03
Homefront
25 Apr 2010
E04
Be All You Can Be
02 May 2010
E05
Guns & Roses
09 May 2010
E06
Evasive Maneuvers
16 May 2010
E07
Heavy Losses
23 May 2010
E08
Over and Out
06 Jun 2010
E09
New Orders
13 Jun 2010
E10
Trial & Error
20 Jun 2010
E11
Safety First
27 Jun 2010
E12
Change of Station
11 Jul 2010
E13
Army Strong
18 Jul 2010
E14
AWOL
25 Jul 2010
E15
Hearts & Minds
01 Aug 2010
E16
Mud, Sweat & Tears
08 Aug 2010
E17
Murder in Charleston
15 Aug 2010
E18
Forward March
22 Aug 2010