Columns: No. | # | Title | Directed by | Written by | U.S. air date | Production code | U.S. viewers (million)
154 | 2 | "Plastique" | Rick Rosenthal | Don Whitehead & Holly Henderson | September25,2008 | 3T7452 | 4.18 | 155 | 3 | "Toxic" | Mairzee Almas | Caroline Dries | October2,2008 | 3T7453 | 4.05 | 156 | 4 | "Instinct" | James Conway | Al Septien & Turi Meyer | October9,2008 | 3T7454 | 4.11 | 157 | 5 | "Committed" | Glen Winter | Bryan Q. Miller | October16,2008 | 3T7455 | 4.18 | 158 | 6 | "Prey" | Michael Rohl | Kelly Souders & Brian Peterson | October23,2008 | 377456 | 4.15 | 159 | 7 | "Identity" | Mairzee Almas | Todd Slavkin & Darren Swimmer | October30,2008 | 3T7457 | 4.32 | 160 | 8 | "Bloodline" | Michael Rohl | Caroline Dries | November6,2008 | 3T7459 | 4.45 | 161 | 9 | "Abyss" | Kevin G. Fair | Don Whitehead & Holly Henderson | November13,2008 | 3T7458 | 3.55 | 162 | 10 | "Bride" | Jeannot Szwarc | Al Septien & Turi Meyer | November20,2008 | 3T7460 | 4.18 | 163 | 11 | "Legion" | Glen Winter | Geoff Johns | January15,2009 | 3T7461 | 4.29 | 164 | 12 | "Bulletproof" | Morgan Beggs | Bryan Miller | January22,2009 | 3T7462 | 3.85 | 165 | 13 | "Power" | Allison Mack | Todd Slavkin & Darren Swimmer | January29,2009 | 3T7463 | 4.21 | 166 | 14 | "Requiem" | Michael Rohl | Don Whitehead & Holly Henderson | February5,2009 | 3T7464 | 3.93 | 167 | 15 | "Infamous" | Glen Winter | Caroline Dries | March12,2009 | 3T7465 | 3.56 | 168 | 16 | "Turbulence" | Kevin G. Fair | Al Septien & Turi Meyer | March19,2009 | 3T7466 | 3.49 | 169 | 17 | "Hex" | Mairzee Almas | Bryan Miller | March26,2009 | 3T7467 | 3.79 | 170 | 18 | "Eternal" | James Marshall | Brian Peterson & Kelly Souders | April2,2009 | 3T7468 | 3.84 | 171 | 19 | "Stiletto" | Kevin G. Fair | Caroline Dries | April23,2009 | 3T7469 | 3.10 | 172 | 20 | "Beast" | Michael Rohl | Genevieve Sparling | April30,2009 | 3T7470 | 3.23 | 173 | 21 | " Injustice" | Tom Welling | Al Septien & Turi Meyer | May7,2009 | 3T7471 | 3.39