| Pilot | 8.6 |
| Deep Throat | 8.4 |
| Squeeze | 8.4 |
| Conduit | 7.8 |
| The Jersey Devil | 6.4 |
| Shadows | 7.7 |
| Ghost in the Machine | 4.5 |
| Ice | 9.1 |
| Space | 8.1 |
| Fallen Angel | 8.6 |
| Eve | 7.5 |
| Fire | 6.9 |
| Beyond the Sea | 10.0 |
| Genderbender | 3.0 |
| Lazarus | 8.0 |
| Young at Heart | 7.8 |
| E.B.E | 9.8 |
| Miracle Man | 7.0 |
| Shapes | 6.8 |
| Darkness Falls | 8.2 |
| Tooms | 8.1 |
| Born Again | 7.8 |
| Roland | 7.7 |
| The Erlenmeyer Flask | 10.0 |
Average - 7.76
Season 2
| Little Green Men | 8.6 |
| The Host | 8.3 |
| Blood | 9.2 |
| Sleepless | 9.0 |
| Duane Barry | 10.0 |
| Ascension | 9.3 |
| 3 | 7.2 |
| One Breath | 9.8 |
| Fire Walker | 6.0 |
| Red Museum | 9.2 |
| Excelsius Dei | 7.2 |
| Aubrey | 9.0 |
| Irresistible | 9.0 |
| Die Hand Die Verletzt | 7.0 |
| Fresh Bones | 6.9 |
| Colony | 9.2 |
| End Game | 9.3 |
| Fearful Symmetry | 7.4 |
| Dod Kalm | 7.3 |
| Humbug | 9.0 |
| The Calusari | 7.2 |
| F. Emasculata | 8.0 |
| Soft Light | 7.5 |
| Our Town | 7.1 |
| Anasazi | 10.0 |
Average - 8.31
Season 3
| The Blessing Way | 9.1 |
| Paper Clip | 10.0 |
| D.P.O | 8.4 |
| Clyde Bruckman's Final Repose | 10.0 |
| The List | 7.8 |
| 2Shy | 7.1 |
| The Walk | 6.6 |
| Oubliette | 9.4 |
| Nisei | 9.3 |
| 731 | 9.7 |
| Revelations | 6.6 |
| War of the Coprophages | 7.9 |
| Syzygy | 7.6 |
| Grotesque | 10.0 |
| Piper Maru | 9.4 |
| Apocrypha | 9.5 |
| Pusher | 9.2 |
| Tesos Dos Bichos | 3.0 |
| Hell Money | 7.3 |
| Jose Chung's "From Outer Space" | 10.0 |
| Avatar | 7.4 |
| Quagmire | 7.5 |
| Wetwired | 8.2 |
| Talitha Cumi | 8.8 |
Average - 8.33
Season 4
| Herrenvolk | 9.0 |
| Home | 8.0 |
| Unruhe | 8.5 |
| Teliko | 6.0 |
| The Field Where I Died | 9.0 |
| Sanguinarium | 5.8 |
| Musings of A Cigarette Smoking Man | 9.5 |
| Tunguska | 10.0 |
| Terma | 9.3 |
| Paper Hearts | 9.6 |
| El Mundo Gira | 6.0 |
| Leonard Betts | 8.0 |
| Never Again | 8.5 |
| Momento Mori | 10.0 |
| Kaddish | 7.0 |
| Unrequited | 7.1 |
| Tempus Fugit | 9.5 |
| Max | 9.4 |
| Synchrony | 7.1 |
| Small Potatoes | 9.2 |
| Zero Sum | 8.5 |
| Elegy | 8.1 |
| Demons | 9.3 |
| Gethsemane | 9.3 |
Average - 8.40
Season 5
| Redux | 9.4 |
| Redux 2 | 10.0 |
| Unusual Suspects | 10.0 |
| Detour | 8.8 |
| Post Modern Prometheus | 10.0 |
| Christmas Carol | 10.0 |
| Emily | 9.3 |
| Kitsunegari | 7.4 |
| Schizogeny | 7.0 |
| Chinga | 9.0 |
| Kill Switch | 9.6 |
| Bad Blood | 9.6 |
| Patient X | 9.7 |
| The Red and the Black | 10.0 |
| Travellers | 7.2 |
| Mind's Eye | 9.0 |
| All Souls | 10.0 |
| The Pine Bluff Varient | 8.9 |
| Folie a Deux | 9.4 |
| The End | 9.6 |
| Fight the Future | 9.8 |
Average - 9.22
Season 6
| The Beginning | 6.9 |
| Drive | 9.5 |
| Triangle | 10.0 |
| Dreamland | 8.0 |
| Dreamland 2 | 9.0 |
| The Ghosts Who Stole Christmas | 8.7 |
| Terms of Endearment | 6.9 |
| Rain King | 6.0 |
| S.R. 819 | 9.7 |
| Tithonus | 9.8 |
| Two Fathers | 8.7 |
| One Son | 9.5 |
| Agua Mala | 6.9 |
| Monday | 8.4 |
| Arcadia | 9.3 |
| Alpha | 6.2 |
| Trevor | 9.2 |
| Milagro | 9.6 |
| The Unnatural | 9.7 |
| Three of a Kind | 8.3 |
| Field Trip | 9.7 |
| Biogenesis | 9.8 |
Average - 8.63
Season 7
| The Sixth Extinction | 9.7 |
| Amor Fati | 9.8 |
| Hungry | 5.0 |
| Millennium | 6.8 |
| Rush | 6.6 |
| The Goldberg Variation | 9.0 |
Average - 7.82