Overview
When a new type of chemical warfare is released into the open air, the BAU must act quickly to find the source before any more innocent people are exposed.
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4 - 1Mayhem September 24, 2008 -
4 - 2The Angel Maker October 01, 2008 -
4 - 3Minimal Loss October 08, 2008 -
4 - 4Paradise October 22, 2008 -
4 - 5Catching Out October 29, 2008 -
4 - 6The Instincts November 05, 2008 -
4 - 7Memoriam November 12, 2008 -
4 - 8Masterpiece November 19, 2008 -
4 - 952 Pickup November 26, 2008 -
4 - 10Brothers in Arms December 10, 2008 -
4 - 11Normal December 17, 2008 -
4 - 12Soul Mates January 14, 2009 -
4 - 13Bloodline January 21, 2009 -
4 - 14Cold Comfort February 11, 2009 -
4 - 15Zoe's Reprise February 18, 2009 -
4 - 16Pleasure Is My Business February 25, 2009 -
4 - 17Demonology March 11, 2009 -
4 - 18Omnivore March 18, 2009 -
4 - 19House on Fire March 25, 2009 -
4 - 20Conflicted April 08, 2009 -
4 - 21A Shade of Gray April 22, 2009 -
4 - 22The Big Wheel April 29, 2009 -
4 - 23Roadkill May 06, 2009 -
4 - 24Amplification May 13, 2009 -
4 - 25To Hell... (1) May 20, 2009 -
4 - 26...And Back (2) May 20, 2009