Sezon 4
Bölümler
1 Alaska 12 Ara 2010 2 Sink or Swim 19 Ara 2010 3 Day from Hell 26 Ara 2010 4 Manhunt 2 Oca 2011 5 Battle for Survival 9 Oca 2011 6 Judgment Day 16 Oca 2011 7 Under Fire 23 Oca 2011 8 Overboard 30 Oca 2011 9 Lock & Load 13 Şub 2011 10 Fallout Zone 20 Şub 2011 11 Tipping Point 27 Şub 2011 12 King of the Hill 6 Mar 2011 13 Fraying at the Edges 13 Mar 2011 14 This Means War 20 Mar 2011 15 The Mouth from the South 3 Nis 2011 16 Blast Off 10 Nis 2011 17 Man Down 17 Nis 2011 18 Final Countdown 24 Nis 2011 19 Fever Pitch 1 May 2011 20 Down To The Wire 8 May 2011