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Star Trek: The Original SeriesSources for Rank/Rating:
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BEST AND/OR ESSENTIAL EPISODES TO WATCHIMDB, avclub, exastris, penksy, tv.com, trakt, trekranks, r/DaystromInstitute, r/startrek
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Best episodes are "Watch", good non-essential episodes are "Optional", and decent, potentially essential episodes are "Consider watch".Sources for Essential vs. Non-Essential:
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"Essential" refers to episodes that are critical to the main plot, or (for less serialized shows) feature major events (e.g. new characters, enemies, etc.)u/kraetos
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EpisodeTitleWatch?Why?
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S0E01The CageOptionalHighly ranked but non-essential
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SEASON 1
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S1E01Where No Man Has Gone BeforeWatchHighly ranked
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S1E02The Corbomite ManeuverWatchHighly ranked
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S1E03Mudd's WomenSkip
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S1E04The Enemy WithinWatchHighly ranked
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S1E05The Man TrapOptionalAbove average but non-essential
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S1E06The Naked TimeWatchHighly ranked
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S1E07Charlie XSkip
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S1E08Balance of TerrorWatchHighly ranked
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S1E09What Are Little Girls Made Of?OptionalAbove average but non-essential
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S1E10Dagger of the MindSkip
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S1E11MiriOptionalAbove average but non-essential
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S1E12The Conscience of the KingSkip
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S1E13The Galileo SevenWatchHighly ranked
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S1E14Court MartialSkip
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S1E15The Menagerie: Parts 1 & 2WatchAbove average and essential
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S1E17Shore LeaveOptionalAbove average but non-essential
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S1E18The Squire of GothosOptionalHighly ranked but non-essential
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S1E19ArenaWatchHighly ranked
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S1E20The Alternative FactorSkip
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S1E21Tomorrow is YesterdayWatchAbove average and essential
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S1E22The Return of the ArchonsSkip
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S1E23A Taste of ArmageddonOptionalHighly ranked but non-essential
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S1E24Space SeedWatchHighly ranked
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S1E25This Side of ParadiseWatchHighly ranked
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S1E26The Devil in the DarkWatchHighly ranked
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S1E27Errand of MercyWatchHighly ranked
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S1E28The City on the Edge of ForeverWatchHighly ranked
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S1E29Operation -- Annihilate!OptionalAbove average but non-essential
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SEASON 2
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S2E01CatspawSkip
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S2E02MetamorphosisSkip
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S2E03Friday's ChildSkip
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S2E04Who Mourns for Adonais?Skip
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S2E05Amok TimeWatchHighly ranked
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S2E06The Doomsday MachineWatchHighly ranked
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S2E07Wolf in the FoldSkip
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S2E08The ChangelingWatchHighly ranked
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S2E09The AppleSkip
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S2E10Mirror, MirrorWatchHighly ranked
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S2E11The Deadly YearsSkip
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S2E12I, MuddOptionalHighly ranked but non-essential
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S2E13The Trouble with TribblesWatchHighly ranked
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S2E14Bread and CircusesSkip
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S2E15Journey to BabelWatchHighly ranked
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S2E16A Private Little WarOptionalAbove average but non-essential
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S2E17The Gamesters of TriskelionSkip
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S2E18ObsessionOptionalAbove average but non-essential
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S2E19The Immunity SyndromeOptionalHighly ranked but non-essential
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S2E20A Piece of the ActionOptionalHighly ranked but non-essential
57
S2E21By Any Other NameOptionalAbove average but non-essential
58
S2E22Return to TomorrowOptionalAbove average but non-essential
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S2E23Patterns of ForceSkip
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S2E24The Ultimate ComputerWatchHighly ranked
61
S2E25The Omega GlorySkip
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S2E26Assignment: EarthSkip
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SEASON 3
64
S3E01Spectre of the GunOptionalHighly ranked but non-essential
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S3E02Elaan of TroyiusSkip
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S3E03The Paradise SyndromeSkip
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S3E04The Enterprise IncidentWatchHighly ranked
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S3E05And the Children Shall LeadSkip
69
S3E06Spock's BrainSkip
70
S3E07Is There in Truth No Beauty?Skip
71
S3E08The EmpathSkip
72
S3E09The Tholian WebWatchHighly ranked
73
S3E10For the World is Hollow and I Have Touched the SkySkip
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S3E11Day of the DoveWatchHighly ranked
75
S3E12Plato's StepchildrenSkip
76
S3E13Wink of an EyeOptionalAbove average but non-essential
77
S3E14That Which SurvivesSkip
78
S3E15Let That Be Your Last BattlefieldSkip
79
S3E16Whom Gods DestroySkip
80
S3E17The Mark of GideonSkip
81
S3E18The Lights of ZetarSkip
82
S3E19The Cloud MindersSkip
83
S3E20The Way to EdenSkip
84
S3E21Requiem for MethuselahSkip
85
S3E22The Savage CurtainSkip
86
S3E23All Our YesterdaysWatchHighly ranked
87
S3E24Turnabout IntruderSkip
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