Once all analyses performed by this site are combined, we are able to predict 74.5% of the quality of an episode based on four factors: who wrote the episode, who directed the episode, when the episode aired, and the presence or absence of major characters in the episode. Altogether, knowing this allows us to look back at episodes and predict how the episodes would be ranked if these four factors explained 100% of the quality of an episode instead of just 74.5%. As you will see, this method predicts the quality of some episodes very well and is off on the quality of other episodes. The Mispredicted Quality page describes how close or far these predictions were for each episode.
| Predicted Rank |
Title | Season/ Episode |
Writer(s) | Director | Actual Rank |
| 1 | Becoming, Part 2 | 2.22 | Joss Whedon | Joss Whedon | 4 |
| 2 | The Gift | 5.22 | Joss Whedon | Joss Whedon | 3 |
| 3 | Chosen | 7.22 | Joss Whedon | Joss Whedon | 6 |
| 4 | Innocence | 2.14 | Joss Whedon | Joss Whedon | 13 |
| 5 | Becoming, Part 1 | 2.21 | Joss Whedon | Joss Whedon | 7 |
| 6 | Graduation Day, Part 2 | 3.22 | Joss Whedon | Joss Whedon | 10 |
| 7 | Once More, with Feeling | 6.07 | Joss Whedon | Joss Whedon | 1 |
| 8 | Restless | 4.22 | Joss Whedon | Joss Whedon | 11 |
| 9 | Hush | 4.10 | Joss Whedon | Joss Whedon | 2 |
| 10 | Doppelgängland | 3.16 | Joss Whedon | Joss Whedon | 12 |
| 11 | Fool for Love | 5.07 | Douglas Petrie | Nick Marck | 16 |
| 12 | Prophecy Girl | 1.12 | Joss Whedon | Joss Whedon | 14 |
| 13 | The Body | 5.16 | Joss Whedon | Joss Whedon | 5 |
| 14 | Amends | 3.10 | Joss Whedon | Joss Whedon | 33 |
| 15 | Graduation Day, Part 1 | 3.21 | Joss Whedon | Joss Whedon | 18 |
| 16 | Tabula Rasa | 6.08 | Rebecca Rand Kirshner | David Grossman | 9 |
| 17 | Passion | 2.17 | Ty King | Michael Gershman | 8 |
| 18 | Lovers Walk | 3.08 | Dan Vebber | David Semel | 24 |
| 19 | Who Are You | 4.16 | Joss Whedon | Joss Whedon | 20 |
| 20 | Family | 5.06 | Joss Whedon | Joss Whedon | 50 |
| 21 | Grave | 6.22 | David Fury | James A. Contner | 22 |
| 22 | Selfless | 7.05 | Drew Goddard | David Solomon | 23 |
| 23 | Two to Go | 6.21 | Douglas Petrie | Bill L. Norton | 35 |
| 24 | The Wish | 3.09 | Marti Noxon | David Greenwalt | 15 |
| 25 | A New Man | 4.12 | Jane Espenson | Michael Gershman | 82 |
| 26 | Forever | 5.17 | Marti Noxon | Marti Noxon | 65 |
| 27 | Normal Again | 6.17 | Diego Gutiérrez | Rick Rosenthal | 32 |
| 28 | Pangs | 4.08 | Jane Espenson | Michael Lange | 44 |
| 29 | Conversations with Dead People | 7.07 | Jane Espenson and Drew Goddard | Nick Marck | 17 |
| 30 | Intervention | 5.18 | Jane Espenson | Michael Gershman | 30 |
| 31 | Checkpoint | 5.12 | Douglas Petrie and Jane Espenson | Nick Marck | 60 |
| 32 | Bad Girls | 3.14 | Douglas Petrie | Michael Lange | 43 |
| 33 | Life Serial | 6.05 | David Fury and Jane Espenson | Nick Marck | 64 |
| 34 | Anne | 3.01 | Joss Whedon | Joss Whedon | 96 |
| 35 | Consequences | 3.15 | Marti Noxon | Michael Gershman | 74 |
| 36 | Bring On the Night | 7.10 | Marti Noxon and Douglas Petrie | David Grossman | 103 |
| 37 | Lie To Me | 2.07 | Joss Whedon | Joss Whedon | 62 |
| 38 | Storyteller | 7.16 | Jane Espenson | Marita Grabiak | 26 |
| 39 | Surprise | 2.13 | Marti Noxon | Michael Lange | 28 |
| 40 | Crush | 5.14 | David Fury | Daniel Attias | 58 |
| 41 | School Hard | 2.03 | David Greenwalt | John T. Kretchmer | 36 |
| 42 | I Only Have Eyes For You | 2.19 | Marti Noxon | James Whitmore Jr. | 38 |
| 43 | The Harvest | 1.02 | Joss Whedon | John T. Kretchmer | 67 |
| 44 | Dead Things | 6.13 | Steven S. DeKnight | James A. Contner | 72 |
| 45 | Wild at Heart | 4.06 | Marti Noxon | David Grossman | 73 |
| 46 | Bargaining, Part 1 | 6.01 | Marti Noxon | David Grossman | 56 |
| 47 | The Yoko Factor | 4.20 | Douglas Petrie | David Grossman | 55 |
| 48 | Seeing Red | 6.19 | Steven S. DeKnight | Michael Gershman | 39 |
| 49 | Band Candy | 3.06 | Jane Espenson | Michael Lange | 31 |
| 50 | Lessons | 7.01 | Joss Whedon | David Solomon | 75 |
| 51 | Hell's Bells | 6.16 | Rebecca Rand Kirshner | David Solomon | 104 |
| 52 | Dirty Girls | 7.18 | Drew Goddard | Michael Gershman | 53 |
| 53 | Helpless | 3.12 | David Fury | James A. Contner | 69 |
| 54 | Angel | 1.07 | David Greenwalt | Scott Brazil | 27 |
| 55 | Halloween | 2.06 | Carl Ellsworth | Bruce Seth Green | 34 |
| 56 | Invisible Girl | 1.11 | Ashley Gable & Thomas A. Swyden | Reza Badiyi | 106 |
| 57 | Entropy | 6.18 | Drew Z. Greenberg | James A. Contner | 79 |
| 58 | Enemies | 3.17 | Douglas Petrie | David Grossman | 40 |
| 59 | Same Time, Same Place | 7.03 | Jane Espenson | James A. Contner | 80 |
| 60 | Lies My Parents Told Me | 7.17 | David Fury and Drew Goddard | David Fury | 47 |
| 61 | Beneath You | 7.02 | Douglas Petrie | Nick Marck | 63 |
| 62 | Triangle | 5.11 | Jane Espenson | Christopher Hibler | 71 |
| 63 | Bewitched, Bothered, and Bewildered | 2.16 | Marti Noxon | James A. Contner | 29 |
| 64 | When She Was Bad | 2.01 | Joss Whedon | Joss Whedon | 66 |
| 65 | Homecoming | 3.05 | David Greenwalt | David Greenwalt | 91 |
| 66 | Into the Woods | 5.10 | Marti Noxon | Marti Noxon | 113 |
| 67 | Bargaining, Part 2 | 6.02 | David Fury | David Grossman | 57 |
| 68 | Where the Wild Things Are | 4.18 | Tracey Forbes | David Solomon | 142 |
| 69 | The Prom | 3.20 | Marti Noxon | David Solomon | 25 |
| 70 | Something Blue | 4.09 | Tracey Forbes | Nick Marck | 19 |
| 71 | Never Leave Me | 7.09 | Drew Goddard | David Solomon | 97 |
| 72 | The Zeppo | 3.13 | Dan Vebber | James Whitmore Jr. | 41 |
| 73 | Blood Ties | 5.13 | Steven S. DeKnight | Michael Gershman | 87 |
| 74 | What's My Line? Part 2 | 2.10 | Marti Noxon | David Semel | 46 |
| 75 | The Freshman | 4.01 | Joss Whedon | Joss Whedon | 101 |
| 76 | Dead Man's Party | 3.02 | Marti Noxon | James Whitmore Jr. | 133 |
| 77 | New Moon Rising | 4.19 | Marti Noxon | James A. Contner | 61 |
| 78 | What's My Line? Part 1 | 2.09 | Howard Gordon and Marti Noxon | David Solomon | 59 |
| 79 | Superstar | 4.17 | Jane Espenson | David Grossman | 85 |
| 80 | Villains | 6.20 | Marti Noxon | David Solomon | 52 |
| 81 | The Witch | 1.03 | Dana Reston | Stephen Cragg | 83 |
| 82 | Choices | 3.19 | David Fury | James A. Contner | 77 |
| 83 | The Initiative | 4.07 | Douglas Petrie | James A. Contner | 102 |
| 84 | Doomed | 4.11 | Marti Noxon, David Fury, and Jane Espenson | James A. Contner | 124 |
| 85 | This Year's Girl | 4.15 | Douglas Petrie | Michael Gershman | 37 |
| 86 | Nightmares | 1.10 | David Greenwalt | Bruce Seth Green | 48 |
| 87 | End of Days | 7.21 | Douglas Petrie and Jane Espenson | Marita Grabiak | 49 |
| 88 | Wrecked | 6.10 | Marti Noxon | David Solomon | 127 |
| 89 | Phases | 2.15 | Rob Des Hotel & Dean Batali | Bruce Seth Green | 92 |
| 90 | Primeval | 4.21 | David Fury | James A. Contner | 45 |
| 91 | Listening to Fear | 5.09 | Rebecca Rand Kirshner | David Solomon | 130 |
| 92 | Tough Love | 5.19 | Rebecca Rand Kirshner | David Grossman | 78 |
| 93 | The Puppet Show | 1.09 | Dean Batali & Rob Des Hotel | Ellen S. Pressman | 98 |
| 94 | The Pack | 1.06 | Matt Kiene & Joe Reinkemeyer | Bruce Seth Green | 88 |
| 95 | Living Conditions | 4.02 | Marti Noxon | David Grossman | 118 |
| 96 | Shadow | 5.08 | David Fury | Daniel Attias | 129 |
| 97 | Showtime | 7.11 | David Fury | Michael Grossman | 93 |
| 98 | Touched | 7.20 | Rebecca Rand Kirshner | David Solomon | 51 |
| 99 | Faith, Hope & Trick | 3.03 | David Greenwalt | James A. Contner | 70 |
| 100 | Earshot | 3.18 | Jane Espenson | Regis Kimble | 21 |
| 101 | Flooded | 6.04 | Douglas Petrie and Jane Espenson | Douglas Petrie | 126 |
| 102 | The Killer in Me | 7.13 | Drew Z. Greenberg | David Solomon | 117 |
| 103 | The Harsh Light of Day | 4.03 | Jane Espenson | James A. Contner | 84 |
| 104 | Doublemeat Palace | 6.12 | Jane Espenson | Nick Marck | 144 |
| 105 | Help | 7.04 | Rebecca Rand Kirshner | Rick Rosenthal | 90 |
| 106 | The Replacement | 5.03 | Jane Espenson | James A. Contner | 89 |
| 107 | Empty Places | 7.19 | Drew Z. Greenberg | James A. Contner | 121 |
| 108 | Out of My Mind | 5.04 | Rebecca Rand Kirshner | David Grossman | 123 |
| 109 | Potential | 7.12 | Rebecca Rand Kirshner | James A. Contner | 111 |
| 110 | After Life | 6.03 | Jane Espenson | David Solomon | 81 |
| 111 | Fear Itself | 4.04 | David Fury | Tucker Gates | 54 |
| 112 | The I in Team | 4.13 | David Fury | James A. Contner | 120 |
| 113 | Him | 7.06 | Drew Z. Greenberg | Michael Gershman | 100 |
| 114 | First Date | 7.14 | Jane Espenson | David Grossman | 115 |
| 115 | Revelations | 3.07 | Douglas Petrie | James A. Contner | 94 |
| 116 | Spiral | 5.20 | Steven S. DeKnight | James A. Contner | 68 |
| 117 | Killed By Death | 2.18 | Rob Des Hotel & Dean Batali | Deran Sarafian | 119 |
| 118 | Get It Done | 7.15 | Douglas Petrie | Douglas Petrie | 107 |
| 119 | Reptile Boy | 2.05 | David Greenwalt | David Greenwalt | 135 |
| 120 | Welcome to the Hellmouth | 1.01 | Joss Whedon | Charles Martin Smith | 42 |
| 121 | Older and Far Away | 6.14 | Drew Z. Greenberg | Michael Gershman | 110 |
| 122 | No Place Like Home | 5.05 | Douglas Petrie | David Solomon | 86 |
| 123 | Teacher's Pet | 1.04 | David Greenwalt | Bruce Seth Green | 140 |
| 124 | Weight of the World | 5.21 | Douglas Petrie | David Solomon | 105 |
| 125 | The Dark Age | 2.08 | Dean Batali & Rob Des Hotel | Bruce Seth Green | 116 |
| 126 | Gingerbread | 3.11 | Jane Espenson | James Whitmore Jr. | 114 |
| 127 | Smashed | 6.09 | Drew Z. Greenberg | Turi Meyer | 76 |
| 128 | Ted | 2.11 | David Greenwalt and Joss Whedon | Bruce Seth Green | 131 |
| 129 | Sleeper | 7.08 | David Fury and Jane Espenson | Alan J. Levi | 109 |
| 130 | Never Kill A Boy on the First Date | 1.05 | Rob Des Hotel & Dean Batali | David Semel | 125 |
| 131 | Gone | 6.11 | David Fury | David Fury | 108 |
| 132 | Some Assembly Required | 2.02 | Ty King | Bruce Seth Green | 136 |
| 133 | Beauty and the Beasts | 3.04 | Marti Noxon | James Whitmore Jr. | 122 |
| 134 | Real Me | 5.02 | David Fury | David Grossman | 99 |
| 135 | Bad Eggs | 2.12 | Marti Noxon | David Greenwalt | 141 |
| 136 | Inca Mummy Girl | 2.04 | Matt Kiene & Joe Reinkemeyer | Ellen S. Pressman | 137 |
| 137 | Beer Bad | 4.05 | Tracey Forbes | David Solomon | 139 |
| 138 | I, Robot — You, Jane | 1.08 | Ashley Gable & Thomas A. Swyden | Stephen L. Posey | 143 |
| 139 | I Was Made to Love You | 5.15 | Jane Espenson | James A. Contner | 112 |
| 140 | All the Way | 6.06 | Steven S. DeKnight | David Solomon | 132 |
| 141 | Goodbye Iowa | 4.14 | Marti Noxon | David Solomon | 128 |
| 142 | Go Fish | 2.20 | David Fury and Elin Hampton | David Semel | 138 |
| 143 | As You Were | 6.15 | Douglas Petrie | Douglas Petrie | 134 |
| 144 | Buffy vs. Dracula | 5.01 | Marti Noxon | David Solomon | 95 |