The Enterprise encounters a powerful energy force that has apparently killed all human life in a solar system with over one billion inhabitants. They identify the culprit ...

The Enterprise is stopped dead in its tracks by a powerful energy force that appears in the form of a human hand. Soon, a being claiming to be Apollo orders Kirk (William ...

Lately, Spock's behavior has been increasingly and unprecedentedly erratic. When McCoy finds it to be a growing medical risk, Kirk drags the truth out of him: it is the ' ...

The Enterprise traces a virus-like outbreak that seems to be traveling in a direct line across a planetary system. The next planet is home to Kirk's brother Sam, his sist ...

When an accident causes Dr. McCoy to go temporarily insane, he escapes to a strange planet. There, the search party discovers a device left by a superior, vanished civili ...

While investigating and scanning an uncharted planet, the Enterprise and its quadrant of space are subjected to a violent force that seems to cause a 'blinking out' of ev ...

War! The Klingons and the Federation are poised on the brink, and then war is declared. Kirk and Spock visit the planet Organia. Organia, inhabited by simple pastoral fol ...

The Enterprise travels to the planet Janus 6 to assist the mining colony there. Kirk, Spock and McCoy beam down to the planet where Chief Engineer Vanderberg tells of a c ...

The Enterprise is ordered to clean up the aftermath of a doomed colony on Omicron Ceti III, a planet under constant irradiation from deadly Berthold Rays. Upon arrival, h ...

On a mission to establish diplomatic relations at Star Cluster NGC321, Kirk and Spock beam down to planet Eminiar 7 to learn that its inhabitants have been at war with a ...

The Enterprise comes across the SS Botany Bay, an ancient Earth spaceship from the 20th century traveling through deep space with a group of genetically engineered humans ...

The Enterprise travels to Beta III to learn the fate of the U.S.S. Archon, gone missing a century earlier. One member of the landing party disappears, and one returns in ...

After encountering a severe ion storm, the Enterprise visits Star Base 11 for repairs. While there, Kirk files a report about the death of crewman and former friend LCDR ...

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 ...