Season 1
***** Excellent (16 episodes = 55.1%)
“Where No Man Has Gone Before"
“The Corbomite Maneuver”
“The Enemy Within”
“The Naked Time”
“Balance Of Terror”
“What Are Little Girls Made Of?”
“Dagger Of The Mind”
“The Galileo Seven”
“Court Martial”
“Shore Leave"
“Arena”
“Tomorrow Is Yesterday”
“A Taste Of Armageddon”
“Space Seed”
“Errand Of Mercy”
“The City On The Edge Of Forever”
**** Good (8 episodes = 27.5%)
“The Man Trap”
“Charlie X”
“The Menagerie” (Part I)
“The Menagerie” (Part II)
“The Squire Of Gothos”
“This Side Of Paradise”
“The Devil In The Dark”
“Operation—Annihilate”
*** Fair (5 episodes = 17.2%)
“Mudd’s Women”
“Miri”
“The Conscience Of The King”
“The Alternative Factor”
“The Return Of The Archons”
** Poor (0 episodes = 0%)
* Bad (0 episodes = 0%)
Season 2
***** Excellent (6 episodes = 23%)
“Amok Time”
“The Doomsday Machine”
“Mirror, Mirror”
“Journey To Babel”
“Return To Tomorrow”
“The Ultimate Computer”
**** Good (10 episodes = 38.4%)
“Metamorphosis”
“Who Mourns For Adonais?”
“The Changeling”
“The Deadly Years”
“The Trouble With Tribbles”
“Bread And Circuses”
“A Private Little War”
“Obsession”
“The Immunity Syndrome”
“The Omega Glory”
*** Fair (7 episodes = 26.9%)
“Catspaw”
“Friday’s Child”
“Wolf In The Fold”
“The Gamesters Of Triskelion”
“By Any Other Name”
“Patterns Of Force”
“Assignment: Earth”
** Poor (3 episodes = 11.5%)
“The Apple”
“I, Mudd”
“A Piece Of The Action”
* Bad (0 episodes = 0%)
Season 3
***** Excellent (4 episodes = 16.6%)
“Elaan Of Troyius”
“The Enterprise Incident”
“Is There In Truth No Beauty?”
“The Tholian Web”
**** Good (8 episodes = 33.3%)
“Spectre Of The Gun”
“The Empath”
“Day Of The Dove”
“Plato’s Stepchildren”
“That Which Survives”
“The Cloud Minders”
“The Way To Eden”
“Requiem For Methuselah”
*** Fair (6 episodes = 25%)
“The Paradise Syndrome”
“For The World Is Hollow And I Have Touched The Sky”
“Let That Be Your Last Battlefield”
“The Lights Of Zetar”
“The Savage Curtain”
“All Our Yesterdays”
** Poor (3 episodes = 12.5%)
“Spock’s Brain”
“The Mark Of Gideon”
“Turnabout Intruder”
* Bad (3 episodes = 12.5%)
“And The Children Shall Lead”
“Wink Of An Eye”
“Whom Gods Destroy”
***** Excellent (16 episodes = 55.1%)
“Where No Man Has Gone Before"
“The Corbomite Maneuver”
“The Enemy Within”
“The Naked Time”
“Balance Of Terror”
“What Are Little Girls Made Of?”
“Dagger Of The Mind”
“The Galileo Seven”
“Court Martial”
“Shore Leave"
“Arena”
“Tomorrow Is Yesterday”
“A Taste Of Armageddon”
“Space Seed”
“Errand Of Mercy”
“The City On The Edge Of Forever”
**** Good (8 episodes = 27.5%)
“The Man Trap”
“Charlie X”
“The Menagerie” (Part I)
“The Menagerie” (Part II)
“The Squire Of Gothos”
“This Side Of Paradise”
“The Devil In The Dark”
“Operation—Annihilate”
*** Fair (5 episodes = 17.2%)
“Mudd’s Women”
“Miri”
“The Conscience Of The King”
“The Alternative Factor”
“The Return Of The Archons”
** Poor (0 episodes = 0%)
* Bad (0 episodes = 0%)
Season 2
***** Excellent (6 episodes = 23%)
“Amok Time”
“The Doomsday Machine”
“Mirror, Mirror”
“Journey To Babel”
“Return To Tomorrow”
“The Ultimate Computer”
**** Good (10 episodes = 38.4%)
“Metamorphosis”
“Who Mourns For Adonais?”
“The Changeling”
“The Deadly Years”
“The Trouble With Tribbles”
“Bread And Circuses”
“A Private Little War”
“Obsession”
“The Immunity Syndrome”
“The Omega Glory”
*** Fair (7 episodes = 26.9%)
“Catspaw”
“Friday’s Child”
“Wolf In The Fold”
“The Gamesters Of Triskelion”
“By Any Other Name”
“Patterns Of Force”
“Assignment: Earth”
** Poor (3 episodes = 11.5%)
“The Apple”
“I, Mudd”
“A Piece Of The Action”
* Bad (0 episodes = 0%)
Season 3
***** Excellent (4 episodes = 16.6%)
“Elaan Of Troyius”
“The Enterprise Incident”
“Is There In Truth No Beauty?”
“The Tholian Web”
**** Good (8 episodes = 33.3%)
“Spectre Of The Gun”
“The Empath”
“Day Of The Dove”
“Plato’s Stepchildren”
“That Which Survives”
“The Cloud Minders”
“The Way To Eden”
“Requiem For Methuselah”
*** Fair (6 episodes = 25%)
“The Paradise Syndrome”
“For The World Is Hollow And I Have Touched The Sky”
“Let That Be Your Last Battlefield”
“The Lights Of Zetar”
“The Savage Curtain”
“All Our Yesterdays”
** Poor (3 episodes = 12.5%)
“Spock’s Brain”
“The Mark Of Gideon”
“Turnabout Intruder”
* Bad (3 episodes = 12.5%)
“And The Children Shall Lead”
“Wink Of An Eye”
“Whom Gods Destroy”