| no | - | title | directed by | written by | us air date | production code | us viewers (million) |
| 175 | 1 | savior | kevin g fair | kelly souders & brian peterson | september 25 , 2009 | 3x5251 | 2.58 |
| 176 | 2 | metallo | mairzee almas | don whitehead & holly henderson | october 2 , 2009 | 3x5252 | 2.24 |
| 177 | 3 | rabid | michael rohl | jordan hawley | october 9 , 2009 | 3x5253 | 2.3 |
| 178 | 4 | echo | wayne rose | bryan miller | october 16 , 2009 | 3x5254 | 2.61 |
| 179 | 5 | roulette | kevin g fair | genevieve sparling | october 23 , 2009 | 3x5256 | 2.52 |
| 180 | 6 | crossfire | michael rohl | don whitehead & holly henderson | october 30 , 2009 | 3x5257 | 2.57 |
| 181 | 7 | kandor | jeannot szwarc | al septien & turi meyer | november 6 , 2009 | 3x5258 | 2.63 |
| 182 | 8 | idol | glen winter | anne cofell saunders | november 13 , 2009 | 3x5255 | 2.68 |
| 183 | 9 | pandora | morgan beggs | drew landis & julia swift | november 20 , 2009 | 3x5259 | 2.45 |
| 184 | 10 | disciple | mairzee almas | jordan hawley | january 29 , 2010 | 3x5260 | 2.52 |
| 185 | 11 | absolute justice | glen winter (1st hour) tom welling (2nd hour) | geoff johns | february 5 , 2010 | 3x5262 / 3x5263 | 2.77 |
| 186 | 12 | warrior | allison mack | bryan miller | february 12 , 2010 | 3x5261 | 2.48 |
| 187 | 13 | persuasion | christopher petry | anne cofell saunders | february 19 , 2010 | 3x5264 | 2.42 |
| 188 | 14 | conspiracy | turi meyer | al septien & turi meyer | february 26 , 2010 | 3x5265 | 2.53 |
| 189 | 15 | escape | kevin g fair | genevieve sparling | april 2 , 2010 | 3x5266 | 2.13 |
| 190 | 16 | checkmate | tim scanlan | john chisholm | april 9 , 2010 | 3x5267 | 2.13 |
| 191 | 17 | upgrade | michael rohl | drew landis & julia swift | april 16 , 2010 | 3x5268 | 1.84 |
| 192 | 18 | charade | brian peterson | don whitehead & holly henderson | april 23 , 2010 | 3x5269 | 2.23 |
| 193 | 19 | sacrifice | kevin g fair | justin hartley , bryan miller & walter wong | april 30 , 2010 | 3x5270 | 1.89 |
| 194 | 20 | hostage | glen winter | jordan hawley & anne cofell saunders | may 7 , 2010 | 3x5271 | 1.92 |