Columns: No. in series | No. in season | Title | Directed by | Written by | Original air date | U.S. viewers (millions)
98 | 1 | "Rio" (Part 4) | Joe Chappelle | Sunil Nayar | September18,2006 | 17.62 | 99 | 2 | "Going Under" | Matt Earl Beesley | Marc Dube & John Haynes | September25,2006 | 17.79 | 100 | 3 | "Death Pool 100" | Sam Hill | Ann Donahue & Elizabeth Devine | October2,2006 | 17.90 | 101 | 4 | "If Looks Could Kill" | Scott Lautanen | Ildy Modrovich & Barry O'Brien | October9,2006 | 17.60 | 102 | 5 | "Death Eminent" | Eagle Egilsson | Corey Miller & Brian Davidson | October16,2006 | 18.12 | 103 | 6 | "Curse of the Coffin" | Joe Chappelle | Sunil Nayar & Krystal Houghton | October23,2006 | 17.83 | 104 | 7 | "High Octane" | Sam Hill | Marc Dube | November6,2006 | 16.80 | 105 | 8 | "Darkroom" | Karen Gaviola | John Haynes | November13,2006 | 18.77 | 106 | 9 | "Going Going Gone" | Matt Earl Beesley | Elizabeth Devine | November20,2006 | 18.54 | 107 | 10 | "Come As You Are" | Joe Chappelle | Brian Davidson | November27,2006 | 17.13 | 108 | 11 | "Backstabbers" | Gina Lamar | Barry O'Brien | December11,2006 | 16.00 | 109 | 12 | "Internal Affairs" | Scott Lautanen | Corey Miller | January8,2007 | 16.01 | 110 | 13 | "Throwing Heat" | Joe Chappelle | Krystal Houghton | January22,2007 | 18.85 | 111 | 14 | "No Man's Land" (Part 1) | Scott Lautanen | Dominic Abeyta | February5,2007 | 18.43 | 112 | 15 | "Man Down" (Part 2) | Karen Gaviola | Ildy Modrovich | February12,2007 | 19.90 | 113 | 16 | "Broken Home" | Sam Hill | Barry O'Brien & Krystal Houghton | February19,2007 | 19.23 | 114 | 17 | "A Grizzly Murder" | Eagle Egilsson | Elizabeth Devine & Brian Davidson | February26,2007 | 17.42 | 115 | 18 | "Triple Threat" | Scott Lautanen | Corey Miller & Sunil Nayar | March19,2007 | 17.66 | 116 | 19 | "Bloodline" | Carey Meyer | John Haynes & Marc Dube | April9,2007 | 16.11 | 117 | 20 | "Rush" | Sam Hill | Ildy Modrovich & Krystal Houghton | April16,2007 | 15.36 | 118 | 21 | "Just Murdered" | Eagle Egilsson | Ty Scott | April23,2007 | 17.03 | 119 | 22 | "Burned" | Anthony Hemingway | Corey Evett & Matt Partney | April30,2007 | 17.24 | 120 | 23 | "Kill Switch" | Scott Lautanen | Corey Miller & Marc Dube | May7,2007 | 17.18