Worst & Best Star Trek ( Original Series 1966 ) Episodes/List

Title: Star Trek (1966)
Genre: US Sci-Fi Series
Series: 3
Episodes: 79
Runtime: 50 min
First Transmission: 1966-1969
Channel: NBC

Follow the adventures of the starship USS Enterprise (NCC-1701) and its crew.


Episode Rankings


Best Episode [ S1 Ep28 ]

The City on the Edge of Forever – A temporarily insane Dr McCoy accidentally changes history when he journeys through a time portal. Kirk and Spock follow him to prevent the disaster, but they have to pay a high price.
6 April 1967


Worst Episode [ S3 Ep4 ]

And the Children Shall Lead – The Enterprise reaches a Federation colony where the adults have all killed themselves but the children still play happily.
11 October 1968


Full Episode Guide

Blue episodes rated above par.
Brown episodes rated below par.

Series One

#1 The Man Trap (1966) –
Dr McCoy discovers his old flame is not what she seems after crew members start dying from a sudden lack of salt in their bodies.
#2 Charlie X (1966) –
A 17-year-old boy with amazing psychokinetic abilities causes mayhem on the Enterprise.
#3 Where No Man Has Gone Before (1966) –
The flight recorder of the 200-year-old U.S.S. Valiant reveals a magnetic storm at the edge of the galaxy!
#4 The Naked Time (1966) –
The Enterprise is infected with a mysterious disease that removes people’s inhibitions to a dangerous degree.
#5 The Enemy Within (1966) –
A transporter malfunction splits Captain Kirk into two people; one meek and indecisive, the other cruel and manipulative.
#6 Mudd’s Women (1966) –
Harry Mudd comes aboard accompanied by three beautiful women who put a spell on all the male crew members.
#7 What Are Little Girls Made Of? (1966) –
Nurse Chapel’s old fiancé makes an android duplicate of Captain Kirk.
#8 Miri (1966) –
The Enterprise encounters a duplicate Earth populated by children who contract a deadly disease on entering puberty.
#9 Dagger of the Mind (1966) –
Kirk and psychiatrist Helen Noel are trapped in a maximum-security penal colony where mind control experiments are performed.
#10 The Corbomite Maneuver (1966) –
After destroying a dangerous marker buoy, the Enterprise is threatened by a gigantic alien ship.
#11 The Menagerie: Part 1 (1966) –
Spock kidnaps the crippled Capt. Pike, hijacks the Enterprise and then surrenders for court-martial.
#12 The Menagerie: Part 2 (1966) –
At the court-martial, Spock explains himself with mysterious footage showing Capt. Pike being kidnapped by powerful illusion casting aliens.
#13 The Conscience of the King (1966) –
Captain Kirk investigates whether an actor is actually a presumed dead mass murderer.
#14 Balance of Terror (1966) –
A Romulan ship makes a hostile armed probe of Federation territory.
#15 Shore Leave (1966) –
The crew takes a well-earned break on a weird planet.
#16 The Galileo Seven (1967) –
The Galileo Seven, under Spock’s command, crash-lands on a hostile planet. The Enterprise must find the crew fast.
#17 The Squire of Gothos (1967) –
A being that controls matter wants to play with the Enterprise crew.
#18 Arena (1967) –
Captain Kirk is pitted in mortal combat against the reptilian captain of an alien ship
#19 Tomorrow Is Yesterday (1967) –
The Enterprise is thrown back in time to 1960s Earth.
#20 Court Martial (1967) –
Kirk is court-martialled for the negligent death of a crewman.
#21 The Return of the Archons (1967) –
The Enterprise encounters a peaceful society under a 6000-year autocratic rule that kills those it cannot absorb.
#22 Space Seed (1967) –
Captain Kirk and his crew find and revive a genetically engineered world conqueror and his acolytes from Earth’s 20th century.
#23 A Taste of Armageddon (1967) –
The Enterprise’s crew is declared killed in action in a bizarre computer-simulated war.
#24 This Side of Paradise (1967) –
The Enterprise investigates a planet whose colonists should all be dead.
#25 The Devil in the Dark (1967) –
The Enterprise is sent to a mining colony that is being terrorised by a mysterious monster.
#26 Errand of Mercy (1967) –
Kirk and Spock attempt to stop the occupation of a peaceful planet by the klingons.
#27 The Alternative Factor (1967) –
Existence itself comes under threat from a man’s power-struggle with his alternate self.
#28 The City on the Edge of Forever (1967) –
Kirk and Spock go back in time to prevent McKoy from changing history.
#29 Operation: Annihilate! (1967) –
The Enterprise must stop a plague of amoeba-like creatures from spreading throughout the galaxy.

Series Two

#30 Amok Time (1967) –
In the throes of his Pon Farr mating period, Spock must return to Vulcan to meet his intended future wife, betrothed from childhood.
#31 Who Mourns for Adonais? (1967) –
The Greek god Apollo appears and demands that the crew of the Enterprise lands on his planet and worship him.
#32 The Changeling (1967) –
An intelligent Earth probe, with a murderous temperament, comes aboard the Enterprise.
#33 Mirror, Mirror (1967) –
A transporter malfunction sends Captain Kirk’s landing party into an alternate universe, where the Enterprise is in the service of a brutal empire.
#34 The Apple (1967) –
Inhabitants of Gamma Trianguli VI worship a God who orders them to kill visitors.
#35 The Doomsday Machine (1967) –
The 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.
#36 Catspaw (1967) –
The crew of the Enterprise encounter two aliens from another galaxy with consciousness-altering powers.
#37 I, Mudd (1967) –
Harry Mudd returns and tries to take over the Enterprise by stranding the crew on a planet populated by androids.
#38 Metamorphosis (1967) –
Kirk, Spock, McCoy and a seriously ill Federation diplomat find themselves kidnapped by an energised cloud.
#39 Journey to Babel (1967) –
The Enterprise hosts a number of diplomats, including Spock’s father, but someone on board has murder in mind.
#40 Friday’s Child (1967) –
A sudden coup between a planet’s warrior-minded inhabitants forces Kirk’s party to flee with the now-dead leader’s pregnant wife.
#41 The Deadly Years (1967) –
A landing party from the Enterprise is exposed to a strange form of radiation which rapidly ages them.
#42 Obsession (1967) –
Capt. Kirk obsessively hunts for the mysterious cloud creature he encountered in his youth.
#43 Wolf in the Fold (1967) –
Scotty is accused of murdering women on a pleasure planet.
#44 The Trouble with Tribbles (1967) –
Tiny, furry animals cause much trouble for Kirk.
#45 The Gamesters of Triskelion (1968) –
Kirk, Uhura and Chekov are trapped on a planet where aliens are enslaved and trained to perform as gladiators.
#46 A Piece of the Action (1968) –
The Enterprise crew lands on a planet modeled on 1920s gangster culture.
#47 The Immunity Syndrome (1968) –
The Enterprise encounters a gigantic energy-draining space organism that threatens the galaxy.
#48 A Private Little War (1968) –
Within a primitive society, the Enterprise discovers that the Klingons are providing a Stone Age society with increasingly-advanced weaponry.
#49 Return to Tomorrow (1968) –
An alien being named Sargon, who exists as pure energy, invites a small team to beam down to a planet that had been destroyed half a million years earlier.
#50 Patterns of Force(1968) –
Kirk and Spock find themselves on a planet whose culture has been completely patterned after Nazi Germany.
#51 By Any Other Name (1968) –
Aliens in human form have seized control of the Enterprise.
#52 The Omega Glory (1968) –
Kirk responds to a distress signal, to find Captain Tracey of the U.S.S. Exeter violating the prime directive and interfering with a war between the Yangs and the Kohms for the secret of their longevity.
#53 The Ultimate Computer (1968) –
The Enterprise has to test the M-5 Multitronic system, which could potentially render them all redundant.
#54 Bread and Circuses (1968) –
The Enterprise crew investigates the disappearance of a ship’s crew on a planet that is a modern version of the Roman Empire.
#55 Assignment: Earth (1968) –
Observing Earth in 1968, the Enterprise crew encounters the mysterious Gary Seven.

Series Three

#56 Spock’s Brain (1968) –
The crew of the Enterprise pursues a mysterious woman who has removed Spock’s brain.
#57 The Enterprise Incident (1968) –
Capt. Kirk has the Enterprise deliberately enter the Romulan Neutral Zone where the ship is immediately captured by the enemy.
#58 The Paradise Syndrome (1968) –
Trapped on a planet, Kirk loses his memory and is proclaimed a God whilst a crippled Enterprise must get back to the planet before it is destroyed by an asteroid.
#59 And the Children Shall Lead (1968) –
The Enterprise reaches a Federation colony where the adults have all killed themselves but the children still play happily.
#60 Is There In Truth No Beauty? (1968) –
A beautiful woman escorts an alien ambassador so ugly that the sight of him can drive a human insane.
#61 Spectre of the Gun (1968) –
As punishment for trespass, the Melkot condemn Capt. Kirk and his landing party to the losing side of a recreation of the 1881 historic gunfight at the OK Corral.
#62 Day of the Dove (1968) –
Both humans and Klingons have been lured to a planet by an entity that feeds on hatred.
#63 For the World Is Hollow and I Have Touched the Sky (1968) –
The Enterprise discovers that an asteroid that is on a collision course with a planet is actually an ancient manned spaceship.
#64 The Tholian Web (1968) –
With Capt. Kirk and the derelict USS Defiant apparently lost, the Enterprise grapples with an insanity causing plague and an attack by the Tholians.
#65 Plato’s Stepchildren (1968) –
The Enterprise discovers a planet inhabited by aliens who were once followers of the Greek philosopher Plato.
#66 Wink of an Eye (1968) –
A group of aliens, who exist in an accelerated state, invade the Enterprise and abduct Capt. Kirk.
#67 The Empath (1968) –
Kirk, Spock and McCoy meet an empath and embark on a series of experiments.
#68 Elaan of Troyius (1968) –
The Enterprise has to transport a demanding Princess whose biochemistry can force men to fall in love with her.
#69 Whom Gods Destroy (1969) –
Kirk and Spock are taken prisoners by a former starship captain named Garth, who has taken over a high-security asylum for the criminally insane.
#70 Let That Be Your Last Battlefield (1969) –
The Enterprise encounters two mutually belligerent aliens who put the ship in the middle of their old conflict.
#71 The Mark of Gideon (1969) –
Kirk beams down to the planet Gideon and finds himself trapped on a deserted Enterprise.
#72 That Which Survives (1969) –
After a landing party beams down to an interesting planet, the Enterprise is hurled across the galaxy.
#73 The Lights of Zetar (1969) –
A mysterious, twinkling mass of energy ravages an important archive and Scotty’s new girlfriend may be linked to it.
#74 Requiem for Methuselah (1969) –
While the Enterprise searches for the cure to a deadly disease, the landing party is confronted by a reclusive man who is willing to kill to preserve his privacy.
#75 The Way to Eden (1969) –
A group of idealistic hippies, led by an irrational leader, come aboard the U.S.S. Enterprise.
#76 The Cloud Minders (1969) –
Kirk and Spock are caught up in a class revolution on a planet.
#77 The Savage Curtain (1969) –
A rock creature needs to understand the concept of “good” vs “evil.”
#78 All Our Yesterdays (1969) –
Kirk, Spock and McCoy find themselves trapped in the past.
#79 Turnabout Intruder (1969) –
Captain Kirk’s ex-lover Dr Janice Lester forcibly switches bodies with him in order to take over the Enterprise.