Beyond the Farthest Star
1x01
Kirk's crew come across an ancient derelict vessel, but something is still living inside it. (Series premiere)
WikiSeason 1
Yesteryear
1x02
Spock travels back in time to prevent his own demise during his youth on Vulcan.
WikiOne of Our Planets Is Missing
1x03
The Enterprise crew learns that a massive, planet-destroying cloud has entered Federation space.
WikiThe Lorelei Signal
1x04
The Enterprise is drawn to a planet populated solely by women who dominate the male crew members' minds to the point that Uhura must assume command to rescue them.
WikiMore Tribbles, More Troubles
1x05
While escorting a shipment of grain to Sherman's Planet, the Enterprise encounters three "old friends": Koloth, Cyrano Jones – and tribbles!
WikiThe Survivor
1x06
The Enterprise encounters the ship of a noted Federation philanthropist, missing for nearly five years, near the Romulan Neutral Zone.
WikiThe Infinite Vulcan
1x07
A species of intelligent plants, led by a clone of a Eugenics Wars-era scientist, clones Spock with the intentions of creating a master race to keep the peace.
WikiThe Magicks of Megas-Tu
1x08
While investigating the theory of creation, the Enterprise is caught inside an energy/matter tornado. After emerging from the storm, the crew encounter a world where magic works and science doesn't.
WikiOnce Upon a Planet
1x09
The Enterprise returns to the shore leave planet in the Omicron Delta region where the crew once took shore leave. As with their previous visit, things go wrong when the illusions turn deadly.
WikiMudd's Passion
1x10
Harry Mudd is back, this time swindling miners with a love potion.
WikiThe Terratin Incident
1x11
When a strange flash of light paralyzes the entire crew of the Enterprise, they begin to shrink. Kirk beams down to the nearest planet, Cepheus, and discovers a miniature race (of descendants of a lost Earth colony) desperate to leave their volcanic homeworld.
WikiThe Time Trap
1x12
The Enterprise becomes trapped in the Delta Triangle, an area of space where many starships have gone missing. To make matters worse, the ship also has to defend itself from the Klothos, a Klingon vessel commanded by Commander Kor.
WikiThe Ambergris Element
1x13
The crew of the Enterprise explore a submerged culture on a water world.
WikiThe Slaver Weapon
1x14
A group of Kzinti divert the shuttle Copernicus and retrieve a newly discovered Slaver weapon.
WikiThe Eye of the Beholder
1x15
Beaming down to a planet to search for the crew of a missing ship, the crew is captured by its alien inhabitants.
WikiThe Jihad
1x16
The Vedala, the oldest known spacefaring race, summon Kirk and Spock to recover the Soul of the Skorr, a stolen religious artifact that has the potential to ignite a holy war across the galaxy. (Season finale)
WikiSeason 2
The Pirates of Orion
2x01
While Spock lies ill, Orion pirates hijack the drug shipment desperately needed to save his life. (Season premiere)
WikiBem
2x02
Ari bn Bem, an erratic observer from the planet Pandro, secretly watches the crew of the USS Enterprise to determine whether the Federation is ready to open diplomatic relations with his advanced species.
WikiThe Practical Joker
2x03
After passing through a strange space energy cloud, the Enterprise's computer gains an artificial intelligence that is relentlessly bent on making practical jokes on the crew.
WikiAlbatross
2x04
Following a mission to the planet Dramia, Dr. McCoy is held prisoner, accused of mass genocide caused by a deadly plague committed nineteen years earlier during a previous expedition. When the Enterprise attempts to investigate, it too becomes infected.
WikiHow Sharper Than a Serpent's Tooth
2x05
The Enterprise encounters a being that once visited the ancient peoples of Earth.
WikiThe Counter-Clock Incident
2x06
When the Enterprise enters a negative universe, former captain Robert April saves the ship as the crew age backwards. (Series finale)
Wiki