When the Enterprise is flung back in time while trying to escape the gravitational pull of a black star, they find themselves in orbit around a 1960's Earth. When they ar ...

When a reptilian alien race known as the Gorn destroys an Earth colony, the Enterprise comes under attack by the Gorn vessel. Captain Kirk soon gives chase to the Gorn sh ...

When Kirk and Sulu vanish into thin air from the bridge of the Enterprise, Spock sends a landing party to the planet below to locate them. What they find is an 18th centu ...

A shuttle craft under Mr. Spock's command is forced to land on a hostile planet. His emotionless approach to command does not sit well with some crew members, particularl ...

The past three months has left the crew of the Enterprise exhausted and in desperate need of a break, but does this explain McCoy's encounter with a human-sized white rab ...

The Enterprise answers a distress call from Federation Outpost #4, a monitoring station on the Federation side of the neutral zone with the Romulan Empire. The outposts w ...

Captain Kirk is informed by his old friend, Dr. Thomas Leighton, that the head of a Shakespearean acting troupe on his world was once known as Kodos the Executioner. As G ...

Spock's court-martial board views the video stream from Talos IV of Captain Pike's imprisonment 13 years earlier and of the Enterprise's attempts to rescue him. The Talos ...

While visiting Starbase 11, the Enterprise is hijacked by Mr. Spock, leaving Captain Kirk behind while abducting the recently crippled Captain Christopher Pike, former co ...

In a section of unexplored space, the Enterprise comes across a marker of sorts that will not let it pass. They destroy the marker and move on but soon find themselves in ...

After a psychologically disturbed patient from the Tantalus penal colony, Dr. Simon Van Gelder, manages to escape to the Enterprise, Dr. McCoy begins to suspect that some ...

The Enterprise receives an old style SOS signal and finds on arrival a planet that is virtually identical to Earth. Kirk, Spock, McCoy and Yeoman Rand beam down to the pl ...

The crew of the Enterprise arrive at the planet EXO-III with some trepidation and great anticipation. They are there to see if hey can locate the renowned scientist Dr. R ...

After stopping a vessel in space, Kirk and the crew find a very odd captain with a very strange cargo. The captain of the vessel is Harcourt Fenton Mudd - known as Harry ...

While beaming back aboard the Enterprise, a transporter malfunction results in two vastly different Captain Kirks being beamed aboard. His personality has in effect been ...

When Lieutenant Junior Grade Tormolen brings aboard an infection that killed the science team on Psi 2000, the crew of the Enterprise soon find themselves unable to contr ...

When the Enterprise attempts to penetrate a space barrier, it is damaged and creates a potentially worse problem. Two crew members, including Kirk's best friend, gain psi ...

The space vessel Antares rescues Charles Evans from the forbidding surface of the planet Thasus, and then hurriedly hands him off to the Enterprise. Soon, mysterious happ ...

In the series premiere, the Enterprise visits planet M-113 where scientists Dr. Crater and his wife Nancy, an old girlfriend of Dr. McCoy, are studying the remains of an ...

The Enterprise is transporting its first captain, Robert April, to Babel where he will reluctantly accept his retirement. When the Enterprise attempts to stop an unidenti ...

When an alien probe self-destructs after scanning Earth, the Enterprise backtracks its trail. An alien ship comes along, encases the Enterprise in a force globe, and tran ...

When the Enterprise visits the planet Dramia, Dr. Leonard Bones McCoy is arrested on charges of genocide. Nineteen years ago, McCoy had visited the neighboring planet Dra ...

In the midst of a stand-off with the Rimulans, The Enterprise's computer systems, gain partial sentience, and with it, starts playing practical jokes upon the crew, which ...

An alien observer aboard the Enterprise, capable of detaching its body parts, chooses a dangerous mission to test Kirk and Spock's resourcefulness to deem them worthy of ...

An illness sweeps the Enterprise, easily treatable for all except Spock, for whom it is fatal. Kirk arranges a tight rendezvous to get strobolin, the cure, in time to sav ...

Kirk and Spock accept a secret mission to a mad planet where they'll search, as two in a six-member team of specialists, for a stolen relic. Three previous expeditions ha ...

Kirk takes the Enterprise to Lactra VII to investigate the disappearance of a Federation science team. While on Lactra, large slug-like aliens add them to their zoo (unit ...

Spock, Uhura and Sulu are en route on a shuttlecraft to Starbase 25 to deliver a Slaver Stasis box - an artifact from a long-dead civilization inside of which time stands ...

The Enterprise investigates conditions on planet Argo, currently a water world whose previous dry world history matches events about to befall a nearly identical Federati ...

Sent to explore the vast Delta Triangle (a veritable Bermuda Triangle in space where vessels have disappeared for centuries), the Enterprise encounters three Klingon ship ...

While on a mapping mission, the Enterprise receives an outdated transmission from the star Cephas. A flash of light from its lone, volcanic planet passes through the ship ...

Once again, Kirk rounds up incorrigible miscreant Harcourt Fenton Mudd, this time trying to sell a love potion to miners. Once incarcerated aboard the Enterprise, Mudd in ...