Spock needs to get back to Vulcan to claim his mate or he'll die!

Kirk needs to keep Klingons from sabotaging the quadrotriticale on the space station... and deal with an adorable infestation.

The god Apollo wants to be worshipped again, but that's just not Kirk's style.

A self-aware pre-Federation Earth probe believes Captain Kirk is its creator.

Transporter malfunction and... Spock has a beard?!?

Spock's having a really bad day: He takes poison barbs to the chest, then he walks into a force field, and then he gets struck by lightning!

Commodore Matt Decker flies a kamikaze mission into an immense planet destroyer. It doesn't work for him, but it does when Kirk tries AND he comes out of it alive.

Witches and castles and dungeons, oh my!

Androids want to take over the galaxy, so Kirk and friends have to short circuit their central brain with illogic... Spock is surprisingly helpful.

Kirk and Co. find out Zephram Cochrane is alive and young again.

Enterprise is transporting Federation delegates to an important meeting. Things are awkward between Spock and his parents. McCoy finally gets the last word!

Did Dr. McCoy just slap a pregnant woman?!?

After beaming down to an Earth outpost near the Romulan neutral zone, the senior staff are subjected to a low level radiation that is causing them to rapidly age.

Kirk is desperate to stop a vampiric gas cloud.

Is Scotty a murderer?

Kirk, Uhura, and Chekov are abducted and forced into a brief stint of slavery as thralls.

Space gangsters

A giant space amoeba is threating the galaxy.

Kirk gets poisoned. Spock gets shot. Nurse Chapel gets slap happy.

Kirk and friends play temporary hosts to three disembodied lifeforms... but one doesn't intend to return his newly acquired body.

Space nazis

Scotty gets drunk. Really, really drunk.

Yangs and Kohms

M-5

Spock and McCoy are gladiators for a day.

Gary Seven is sent to stop a nuclear weapons platform from being launched and... wait a minute? Did his cat just turn into a woman?!?

A creature that survives on salt, stolen from the bodies of its vicitms, terrorizes the Enterprise crew.

The Enterprise picks up an unusual teenage boy.

Kirk attempts to maroon an old friend on an unpopulated planet after he mutates into a dangerously powerful psionic being.

Sulu swordfights topless in the halls, Kevin Reilly can't seem to stop singing 'I'll Take You Home Again Kathleen,' and Spock cries.

You're not seeing double: A transporter malfunction has split Captain Kirk in two.

Kirk and crew first meet the notorious con-artist Harry Mudd.

We learn that Nurse Chapel has a fiance, but he's been missing for quite some time... and has more than a few secrets.

Kirk and Co. beam down to a planet whose population become sick and die when they reach puberty. The landing party soon contracts the disease themselves.

Kirk and a crewmember are held hostage on a rehabilitation colony. The first ever mindmeld is performed on an escapee from the colony.

Hey! Isn't that Ron Howard's little brother?

Spock hijacks the Enterprise to return a former captain to the forbidden planet Tarsus IV.

A troupe of actors board the Enterprise, attempted murder soon ensues.

First appearance of the Romulans and... HEY isn't he Spock's dad?!?

White rabbits, princesses, and FINNEGAN!

Two men die under Spock's first command and when all logical options are exhausted he reasons that it's time for an act of desperation.

SPOILER ALERT: Trelane, the seemingly omnipotent alien being, is actually a child.

Best fight in TV history: Kirk vs. The Gorn.

Kirk has to return a 20th century man home so that he can father his son and thus preserve the timeline.

Kirk faces inquiry in the alleged death of a crewman and old friend.

SPOILER ALERT: The society is run by a computer called Landru.

A group of genetically altered 'supermen' are woken from their cryogenic sleep by Kirk and Co. They soon attempt to take control of the ship.

Kirk and crew are stranded on a planet whose population has been fighting a computerized war.

The spores of an alien planet are taking control of Kirk's crew.

SPOILER ALERT: She's called a Horta, and she only started attacking the miners because they broke into the nursery and started smashing her eggs.

The Klingons make their first ever appearance and Spock gets his mind sifted.

A man learns that he and his counterpart must enclose themselves in the 'anti-matter universe' lest they destroy the universes paralleling it.

SPOILER ALERT: Joan Collins must die to restore the tiimeline.

Spock gets stung by what appears to be fake rubber vomit, suffers severe pain, and gets blinded... but only temporarily.

An alien has removed one of the Science Officer's vital organs. Kirk and friends have to retrieve it.

Spock gets cozy with a female Romulan Commander while Kirk steals her ship's cloaking device.

Kirk gets amnesia and marries an Indian princess.

'Hail hail, fire and snow/Call the angel we will go/Far away, far to see/Friendly angel, come to me.'

SPOILER ALERT: She can look at the Medusans without going insane because she's blind.

Kirk and friends find themselves at the O.K. Corral reliving the Clantons and McLaurys' final hours.

Unbeknownst to them, the Enterprise crew is being forced to fight Klingons by an unseen entity. Once both sides realize what's going on they banish the thing with laughter.

McCoy is dying from xenopolycythemia.

The crew believes Kirk to be dead, but he's only trapped between dimensions.

A group of telekinetic beings want McCoy to stay with them to be their doctor. They make Kirk and Spock dance.. among other things.

Hyper-accelerated aliens intend to cryogenically freeze the Enterprise crew and use them in the hopes of rebuilding their own sterile race.

Kirk, Spock, and McCoy are taken so an alien species can test the worthiness of another race.

The Enterprise must transport the Dohlman of Elas to her arranged wedding.

The inmates have taken over the asylum!

Two men are the last of their race. Even after learning that their civilization has been wiped out by war and prejudice, they continue fighting one another.

SPOILER ALERT: Kirk was taken in hopes that he might infect the woman with Vegan chorlomeningitis so the illness could balance the planets population.

The crew learns that the assassin who has been taking out members of the landing party is a computer generated likeness of the last survivor of the abandoned outpost they found.

Memory Alpha station

SPOILER ALERT: Kirk's love interest is actually an android.

Space hippies.

The cloud city, Stratos

Abraham Lincoln and Surak of Vulcan team up with Kirk and Spock to fight evil.

Kirk, Spock, and McCoy are caught in the past of a planet whose sun is about to supernova. Spock briefly reverts to the ancient ways.

Kirk becomes a woman.... not by choice.

Captain Pike is taken prisoner by the inhabitants of Tarsus IV.