What are the best episodes of Star Trek?

The best rated episodes of Star Trek are: The City on the Edge of Forever - S1E28 rated 8.2, The Trouble With Tribbles - S2E15 rated 8.2, Mirror, Mirror - S2E4 rated 8.1, Balance of Terror - S1E14 rated 8.0, Amok Time - S2E1 rated 8.0, The Doomsday Machine - S2E6 rated 8.0, Journey to Babel - S2E10 rated 7.9, Space Seed - S1E22 rated 7.9, The Enterprise Incident - S3E2 rated 7.8, A Taste of Armageddon - S1E23 rated 7.8

What are the worst episodes of Star Trek?

The lowest rated episodes of Star Trek are: And the Children Shall Lead - S3E4 rated 6.0, The Alternative Factor - S1E27 rated 6.1, The Way to Eden - S3E20 rated 6.2, The Omega Glory - S2E23 rated 6.3, Spock's Brain - S3E1 rated 6.5, A Private Little War - S2E19 rated 6.5, Catspaw - S2E7 rated 6.6, Plato's Stepchildren - S3E10 rated 6.6, The Empath - S3E12 rated 6.6, Elaan of Troyius - S3E13 rated 6.6

Star Trek Episode Rating Graph

Sep 1966 - Jun 1969

8.1

Click the chart for info!

Browse episode ratings trends for Star Trek. Simply click on the interactive rating graph to explore the best and worst of Star Trek's 79 episodes.

Best Episodes of Star Trek

The City on the Edge of Forever
S1 Ep28
8.2
6th Apr 1967
Kirk and Spock must travel into the past in order to correct a change that will alter history.
The Trouble With Tribbles
S2 Ep15
8.2
29th Dec 1967
The Enterprise must protect a very important shipment of grain from both Klingons and some adorable creatures called tribbles.
Mirror, Mirror
S2 Ep4
8.1
6th Oct 1967
A transporter mishap swaps Captain Kirk and his companions with their evil counterparts in a parallel universe. In the so-called Mirror Universe, the Enterprise is a ship of the Terran Empire, an organization as evil as the United Federation of Planets is benevolent.
Balance of Terror
S1 Ep14
8.0
15th Dec 1966
Kirk pits the Enterprise against an invisible spaceship testing the Federation's defenses.
Amok Time
S2 Ep1
8.0
15th Sep 1967
First Officer Spock returns to his home world for a brutal Vulcan mating ritual.
The Doomsday Machine
S2 Ep6
8.0
20th Oct 1967
The starship Enterprise and its heavily-damaged sister ship, the USS Constellation, must work together to stop an alien planet-killing machine headed for the heart of Federation territory.
Journey to Babel
S2 Ep10
7.9
17th Nov 1967
The Enterprise must transport dignitaries to a peace conference, with an assassin on the loose.
Space Seed
S1 Ep22
7.9
16th Feb 1967
The Enterprise picks up a crew of genetic supermen from the 20th century... and their leader, Khan, plans to create a new empire.
The Enterprise Incident
S3 Ep2
7.8
27th Sep 1968
The crew of the Enterprise are on a secret mission to steal a Romulan cloaking device.
A Taste of Armageddon
S1 Ep23
7.8
23rd Feb 1967
The Enterprise arrives at a planet to establish diplomatic relations and finds itself in the middle of a "peaceful" war that threatens to destroy the ship.
The Menagerie (1)
S1 Ep11
7.7
17th Nov 1966
Spock kidnaps his former captain, the crippled Christopher Pike, and heads for a quarantined planet, putting his career and Kirk's life on the line.
The Ultimate Computer
S2 Ep24
7.7
8th Mar 1968
A skeleton Enterprise crew are assigned to test a revolutionary computer system that is given total control of the ship.
The Menagerie (2)
S1 Ep12
7.6
24th Nov 1966
Spock's court-martial continues as he attempts to justify his abduction of Pike, the theft of the Enterprise, and his heading for a planet declared forbidden by Starfleet.
The Tholian Web
S3 Ep9
7.6
15th Nov 1968
Captain Kirk is caught between dimensions while the crew of the Enterprise works to retrieve him. All the while, the Tholians demand that the Enterprise leave their space.
The Devil in the Dark
S1 Ep25
7.6
9th Mar 1967
Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.
Tomorrow Is Yesterday
S1 Ep19
7.5
26th Jan 1967
In a freak accident the Enterprise is sent back to 20th century Earth, and must find their way back without changing history.
Errand of Mercy
S1 Ep26
7.5
23rd Mar 1967
The Federation and the Klingon Empire teeter on the brink of war as Kirk investigates Organia, a humble planet, inhabited by pacifists, that is unwittingly caught in the middle.
Court Martial
S1 Ep20
7.5
2nd Feb 1967
Captain Kirk's career is at stake when he is put on trial for the loss of a crewman during an ion storm.
The Corbomite Maneuver
S1 Ep10
7.5
10th Nov 1966
The Enterprise encounters a vast alien ship that threatens the Enterprise with destruction.
All Our Yesterdays
S3 Ep23
7.4
14th Mar 1969
Kirk, Spock and McCoy are trapped in two parts of another planet's past - a world threatened with destruction when its sun goes supernova.
The Naked Time
S1 Ep4
7.4
29th Sep 1966
A strange alien substance causes the crew to lose their inhibitions.
The Changeling
S2 Ep3
7.4
29th Sep 1967
The crew of the USS Enterprise deals with an indestructible planet-destroying space probe.
This Side of Paradise
S1 Ep24
7.4
2nd Mar 1967
The Enterprise crew try to rescue colonists from deadly radiation, but instead encounter strange alien spores that seem to offer paradise.
By Any Other Name
S2 Ep22
7.4
23rd Feb 1968
Beings from another galaxy commandeer the Enterprise in an attempt to return home.

Worst Episodes of Star Trek

And the Children Shall Lead
S3 Ep4
6.0
11th Oct 1968
On a distant planet, Kirk, Spock and McCoy find a scientific team dead, and their children who, unknown to the crew, have great powers at their disposal.
The Alternative Factor
S1 Ep27
6.1
30th Mar 1967
Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe.
The Way to Eden
S3 Ep20
6.2
21st Feb 1969
The Enterprise picks up a group of space "hippies" looking for Eden.
The Omega Glory
S2 Ep23
6.3
1st Mar 1968
Captain Kirk must find the cure to a deadly disease and put an end to another Starfleet captain's cultural interference.
Spock's Brain
S3 Ep1
6.5
20th Sep 1968
An alien female beams aboard the ship and, after incapacitating the rest of the crew, surgically removes Spock's brain. Kirk and the crew have just hours to locate and replace it before Spock's body dies.
A Private Little War
S2 Ep19
6.5
2nd Feb 1968
The crew of the Enterprise discovers Klingon interference in the development of a formerly peaceful planet and is forced to help maintain a balance of power.
Catspaw
S2 Ep7
6.6
27th Oct 1967
Two powerful aliens threaten the well-being of the Enterprise and her crew.
Plato's Stepchildren
S3 Ep10
6.6
22nd Nov 1968
The crew of the Enterprise encounters an ageless and sadistic race of humanoids with the power of telekinesis and who claim to have organized their society around Ancient Greek ideals.
The Empath
S3 Ep12
6.6
6th Dec 1968
While visiting a doomed planet, the landing party is subject to torturous experiments by powerful aliens.
Elaan of Troyius
S3 Ep13
6.6
20th Dec 1968
The USS Enterprise ferries a spoiled princess whose betrothal to a royal Troyian is hoped will bring peace to a star system at war.
That Which Survives
S3 Ep17
6.6
24th Jan 1969
Kirk, McCoy, and Sulu are stranded on a barren planet where a mysterious woman attempts to kill them one at a time, while the Enterprise must travel halfway across the galaxy to rescue them.
The Paradise Syndrome
S3 Ep3
6.6
4th Oct 1968
An alien device on a primitive planet erases Captain Kirk's memory, and he begins a new life with the planet's indigenous people.
Miri
S1 Ep8
6.7
27th Oct 1966
Kirk and a landing party are stranded on a planet due to a disease that causes any adult to die a painful death, and must deal with the local children who have survived.
The Gamesters of Triskelion
S2 Ep16
6.7
5th Jan 1968
Captain Kirk and his companions are abducted into slavery and trained to fight as gladiators for the gambling entertainment of three disembodied beings.
The Lights of Zetar
S3 Ep18
6.7
31st Jan 1969
Strange incorporeal aliens threaten the Memory Alpha station and the Enterprise.
The Savage Curtain
S3 Ep22
6.7
7th Mar 1969
Aliens force Captain Kirk and First Officer Spock to join forces with "Abraham Lincoln" and "Surak" to battle villains in a contest of good vs. evil.
The Mark of Gideon
S3 Ep16
6.8
17th Jan 1969
A race of overpopulated aliens abduct Captain Kirk to solve their problem.
The Apple
S2 Ep5
6.8
13th Oct 1967
The crew of the Enterprise visits a mysterious paradisical planet controlled by a computer that is served by the local inhabitants.
The Conscience of the King
S1 Ep13
6.8
8th Dec 1966
Kirk is one of the last survivors who can identify a mass killer, who lurks among a Shakespearean troupe aboard the Enterprise.
Friday's Child
S2 Ep11
6.9
1st Dec 1967
The crew of the Enterprise become entangled in a planet's tribal power struggle.
Bread and Circuses
S2 Ep25
6.9
15th Mar 1968
The Enterprise crew investigates the disappearance of a ship's crew on a planet that is a modern version of the Roman Empire.
Who Mourns for Adonais?
S2 Ep2
6.9
22nd Sep 1967
The crew of the Enterprise are held captive by an alien who turns out to be the Greek god Apollo.
Mudd's Women
S1 Ep6
6.9
13th Oct 1966
The Enterprise picks up a intergalactic conman, Harry Mudd, and three incredibly beautiful women who harbor a dark secret.
Wolf in the Fold
S2 Ep14
6.9
22nd Dec 1967
A series of bizarre murders points to Mr. Scott as the prime suspect.

Star Trek Episode Guide

The Man Trap
S1 Ep1
7.3
8th Sep 1966
Kirk and his crew are at deadly risk from an alien creature that feeds on the salt in a human body and can take on any form.
Charlie X
S1 Ep2
7.1
15th Sep 1966
Charlie Evans, the sole survivor of a transport crash, is transferred to the Enterprise from a different ship. Why are they so eager to rid themselves of him, though? There's more to Charlie than meets the eye...
Where No Man Has Gone Before
S1 Ep3
7.3
22nd Sep 1966
While exploring the edge of the galaxy, the Enterprise encounters an energy barrier that gives some crewmen strange powers.
The Naked Time
S1 Ep4
7.4
29th Sep 1966
A strange alien substance causes the crew to lose their inhibitions.
The Enemy Within
S1 Ep5
7.2
6th Oct 1966
A transporter malfunction causes Captain Kirk to split into his "good" and "evil" selves, and a landing party will freeze to death if they don't merge the two back together.
Mudd's Women
S1 Ep6
6.9
13th Oct 1966
The Enterprise picks up a intergalactic conman, Harry Mudd, and three incredibly beautiful women who harbor a dark secret.
What Are Little Girls Made Of?
S1 Ep7
7.3
20th Oct 1966
Nurse Christine Chapel is reunited with her old fiance on Exo III, but the scientist has plans for Captain Kirk and the Federation.
Miri
S1 Ep8
6.7
27th Oct 1966
Kirk and a landing party are stranded on a planet due to a disease that causes any adult to die a painful death, and must deal with the local children who have survived.
Dagger of the Mind
S1 Ep9
7.2
3rd Nov 1966
Kirk investigates an experimental facility for holding prisoners and finds a sinister scheme.
The Corbomite Maneuver
S1 Ep10
7.5
10th Nov 1966
The Enterprise encounters a vast alien ship that threatens the Enterprise with destruction.
The Menagerie (1)
S1 Ep11
7.7
17th Nov 1966
Spock kidnaps his former captain, the crippled Christopher Pike, and heads for a quarantined planet, putting his career and Kirk's life on the line.
The Menagerie (2)
S1 Ep12
7.6
24th Nov 1966
Spock's court-martial continues as he attempts to justify his abduction of Pike, the theft of the Enterprise, and his heading for a planet declared forbidden by Starfleet.
The Conscience of the King
S1 Ep13
6.8
8th Dec 1966
Kirk is one of the last survivors who can identify a mass killer, who lurks among a Shakespearean troupe aboard the Enterprise.
Balance of Terror
S1 Ep14
8.0
15th Dec 1966
Kirk pits the Enterprise against an invisible spaceship testing the Federation's defenses.
Shore Leave
S1 Ep15
6.9
29th Dec 1966
The Enterprise crew take shore leave on a peaceful, pastoral planet... where their dreams and fantasies come to life.
The Galileo Seven
S1 Ep16
7.3
5th Jan 1967
Spock commands a stranded away team when their shuttlecraft crash lands on a planet with hostile natives.
The Squire of Gothos
S1 Ep17
7.0
12th Jan 1967
The Enterprise finds itself at the mercy of a seemingly omnipotent being who fancies himself an 18th century Englishman.
Arena
S1 Ep18
7.2
19th Jan 1967
When a mysterious alien race destroy an Earth colony, the Enterprise pursues, but Kirk and the alien captain are forced to fight each other by powerful aliens.
Tomorrow Is Yesterday
S1 Ep19
7.5
26th Jan 1967
In a freak accident the Enterprise is sent back to 20th century Earth, and must find their way back without changing history.
Court Martial
S1 Ep20
7.5
2nd Feb 1967
Captain Kirk's career is at stake when he is put on trial for the loss of a crewman during an ion storm.
The Return of the Archons
S1 Ep21
7.2
9th Feb 1967
The Enterprise encounters a seemingly peaceful civilization run by a "benevolent" being named Landru... who intends for them to join his people.
Space Seed
S1 Ep22
7.9
16th Feb 1967
The Enterprise picks up a crew of genetic supermen from the 20th century... and their leader, Khan, plans to create a new empire.
A Taste of Armageddon
S1 Ep23
7.8
23rd Feb 1967
The Enterprise arrives at a planet to establish diplomatic relations and finds itself in the middle of a "peaceful" war that threatens to destroy the ship.
This Side of Paradise
S1 Ep24
7.4
2nd Mar 1967
The Enterprise crew try to rescue colonists from deadly radiation, but instead encounter strange alien spores that seem to offer paradise.
The Devil in the Dark
S1 Ep25
7.6
9th Mar 1967
Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.
Errand of Mercy
S1 Ep26
7.5
23rd Mar 1967
The Federation and the Klingon Empire teeter on the brink of war as Kirk investigates Organia, a humble planet, inhabited by pacifists, that is unwittingly caught in the middle.
The Alternative Factor
S1 Ep27
6.1
30th Mar 1967
Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe.
The City on the Edge of Forever
S1 Ep28
8.2
6th Apr 1967
Kirk and Spock must travel into the past in order to correct a change that will alter history.
Operation: Annihilate!
S1 Ep29
7.3
13th Apr 1967
Kirk and the Enterprise must combat parasitic aliens threatening the lives of millions.

Space. The Final Frontier. The U.S.S. Enterprise embarks on a five year mission to explore the galaxy. The Enterprise is under the command of Captain James T. Kirk with First Officer Mr. Spock, from the planet Vulcan. With a determined crew, the Enterprise encounters Klingons, Romulans, time paradoxes, tribbles and genetic supermen led by Khan Noonian Singh. Their mission is to explore strange new worlds, to seek new life and new civilizations, and to boldly go where no man has gone before.

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