Columns: No. in series | No. in season | Title | Directed by | Written by | Original air date | U.S. viewers (millions)
46 | 1 | "Doubt" | Gloria Muzio | Chris Mundy | September26,2007 | 12.66 | 47 | 2 | "In Name and Blood (In Birth and Death)" | Edward Allen Bernero | Chris Mundy | October3,2007 | 14.56 | 48 | 3 | "Scared to Death" | Félix Alcalá | Erica Messer & Debra J. Fisher | October10,2007 | 14.55 | 49 | 4 | "Children of the Dark" | Guy Norman Bee | Jay Beattie & Dan Dworkin | October17,2007 | 15.03 | 50 | 5 | "Seven Seconds" | John Gallagher | Andi Bushell | October24,2007 | 15.05 | 51 | 6 | "About Face" | Skipp Sudduth | Charles Murray | October31,2007 | 14.94 | 52 | 7 | "Identity" | Gwyneth Horder-Payton | Oanh Ly | November7,2007 | 14.65 | 53 | 8 | "Lucky (Part I)" | Steve Boyum | Andrew Wilder | November14,2007 | 15.73 | 54 | 9 | "Penelope (Part II)" | Félix Alcalá | Chris Mundy | November21,2007 | 15.88 | 55 | 10 | "True Night" | Edward Allen Bernero | Edward Allen Bernero | November28,2007 | 16.23 | 56 | 11 | "Birthright" | John Gallagher | Erica Messer & Debra J. Fisher | December12,2007 | 14.18 | 57 | 12 | "3rd Life" | Anthony Hemingway | Simon Mirren | January9,2008 | 14.30 | 58 | 13 | "Limelight" | Glenn Kershaw | Jay Beattie & Dan Dworkin | January23,2008 | 12.67 | 59 | 14 | "Damaged" | Edward Allen Bernero | Edward Allen Bernero | April2,2008 | 12.81 | 60 | 15 | "A Higher Power" | Félix Alcalá | Michael Udesky | April9,2008 | 13.33 | 61 | 16 | "Elephant's Memory" | Bobby Roth | Andrew Wilder | April16,2008 | 12.98 | 62 | 17 | "In Heat" | John Gallagher | Andi Bushell | April30,2008 | 13.03 | 63 | 18 | "The Crossing" | Guy Norman Bee | Erica Messer & Debra J. Fisher | May7,2008 | 12.88 | 64 | 19 | "Tabula Rasa" | Steve Boyum | Jay Beattie & Don Dworkin | May14,2008 | 12.88