Star Trek: Original Series Episodes Ranked Best to Worst
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- DirectorJoseph PevneyStarsWilliam ShatnerLeonard NimoyJoan CollinsWhen a temporarily insane Dr. McCoy accidentally changes history and destroys his time, Kirk and Spock follow him to prevent the disaster, but the price to do so is high.S1.E28
- DirectorMarc DanielsStarsWilliam ShatnerLeonard NimoyDeForest KelleyA transporter accident places Captain Kirk's landing party in an alternate universe, where the Enterprise is in the service of a barbarically brutal empire.S2.E4
- DirectorVincent McEveetyStarsWilliam ShatnerLeonard NimoyMark LenardThe Enterprise must decide on its response when a Romulan ship makes a destructively hostile armed probe of Federation territory.S1.E14
- DirectorJoseph PevneyStarsWilliam ShatnerLeonard NimoyDeForest KelleyTo protect a space station with a vital grain shipment, Kirk must deal with Federation bureaucrats, a Klingon battle cruiser and a peddler who sells furry, purring, hungry little creatures as pets.S2.E15
- DirectorMarc DanielsStarsWilliam ShatnerLeonard NimoyRicardo MontalbanWhile on patrol in deep space, Captain Kirk and his crew find and revive a genetically-engineered world conqueror and his compatriots from Earth's Twentieth Century.S1.E22
- DirectorMarc DanielsStarsWilliam ShatnerLeonard NimoyDeForest KelleyThe USS Enterprise encounters the wrecked USS Constellation and its distraught commodore who's determined to stop the giant planet-destroying robot ship that killed his crew.S2.E6
- DirectorJoseph PevneyStarsWilliam ShatnerLeonard NimoyDeForest KelleyIn the throes of his Pon Farr mating period, Spock must return to Vulcan to meet his intended future wife, betrothed from childhood.S2.E1
- DirectorJoseph PevneyStarsWilliam ShatnerLeonard NimoyDeForest KelleyThe Enterprise hosts a number of quarrelling diplomats, including Spock's father, but someone on board has murder in mind.S2.E10
- DirectorJohn Meredyth LucasStarsWilliam ShatnerLeonard NimoyDeForest KelleyAn apparently insane Capt. Kirk has the Enterprise deliberately enter the Romulan Neutral Zone where the ship is immediately captured by the enemy.S3.E2
- DirectorJoseph PevneyStarsWilliam ShatnerLeonard NimoyDeForest KelleyThe Enterprise is sent to a mining colony that is being terrorized by a mysterious monster, only to find that the situation is not that simple.S1.E25
- DirectorMarc DanielsRobert ButlerStarsWilliam ShatnerLeonard NimoyJeffrey HunterSpock kidnaps the disabled Capt. Pike, hijacks the Enterprise, and then surrenders for court martial.S1.E11
- DirectorRobert ButlerMarc DanielsStarsWilliam ShatnerLeonard NimoyJeffrey HunterAt Spock's court martial, he explains himself with mysterious footage about when Capt. Pike was kidnapped by powerful illusion casting aliens.S1.E12
- DirectorJohn NewlandStarsWilliam ShatnerLeonard NimoyJohn AbbottWith a war with Klingons raging, Kirk and Spock attempt to resist an occupation of a planet with incomprehensibly placid natives.S1.E26
- DirectorMarvin J. ChomskyStarsWilliam ShatnerLeonard NimoyDeForest KelleyWhen Kirk, Spock and McCoy investigate the disappearance of a doomed planet's population, they find themselves trapped in different periods of that world's past.S3.E23
- DirectorJoseph SargentStarsWilliam ShatnerLeonard NimoyAnthony D. CallAfter the Enterprise is forced to destroy a dangerous marker buoy, a gigantic alien ship arrives to capture and condemn the crew as trespassers.S1.E10
- DirectorJoseph PevneyStarsWilliam ShatnerLeonard NimoyDavid OpatoshuKirk and Spock must save their ship's crew when they are all declared killed in action in a bizarre computer simulated war where the actual deaths must nevertheless occur.S1.E23
- DirectorJohn Meredyth LucasStarsWilliam ShatnerLeonard NimoyDeForest KelleyKirk and a sub-skeleton crew are ordered to test out an advanced artificially intelligent control system - the M-5 Multitronic system, which could potentially render them all redundant.S2.E24
- DirectorHerb WallersteinRalph SenenskyStarsWilliam ShatnerLeonard NimoyDeForest KelleyWith Capt. Kirk and the derelict USS Defiant apparently lost, the Enterprise grapples with an insanity causing plague and an attack by the Tholians.S3.E9
- DirectorJoseph PevneyStarsWilliam ShatnerLeonard NimoyDeForest KelleyFor bringing hostility into their solar system, a superior alien race brings Captain Kirk into mortal combat against the reptilian captain of an alien ship he was pursuing.S1.E18
- DirectorMichael O'HerlihyStarsWilliam ShatnerLeonard NimoyRoger PerryThe Enterprise is thrown back in time to 1960s Earth.S1.E19
- DirectorMarc DanielsStarsWilliam ShatnerLeonard NimoyStewart MossThe crew is infected with a mysterious disease that removes people's emotional inhibitions to a dangerous degree.S1.E4
- DirectorRalph SenenskyStarsWilliam ShatnerLeonard NimoyJill IrelandThe Enterprise investigates a planet whose colonists should be dead, but are not.S1.E24
- DirectorJames GoldstoneStarsWilliam ShatnerLeonard NimoyGary LockwoodThe flight recorder of the 200-year-old U.S.S. Valiant relays a tale of terror--a magnetic storm at the edge of the galaxy.S1.E3
- DirectorJames KomackStarsWilliam ShatnerLeonard NimoyDeForest KelleyThe crew of the Enterprise struggles to cope with a planet of imitative people who have modeled their society on 1920s gangsters.S2.E17
- DirectorMarvin J. ChomskyStarsWilliam ShatnerLeonard NimoyDeForest KelleyBoth humans and Klingons have been lured to a planet by a formless entity that feeds on hatred and has set about to fashion them into a permanent food supply for itself.S3.E7