Season One

Episode Highlights

Yesteryear

09/15/73 -- Stardate: 5373.4

During a trip through the Guardian of Forever time portal, Spock's past is accidentally changed, and he must travel back into his own past and save his younger self.

One of Our Planets Is Missing

09/22/73 -- Stardate: 5371.3

The Enterprise encounters a cloud creature that feeds on the energy of planets in its path, but Spock mind melds with the entity and persuades it to return to its place of origin.

The Lorelei Signal

09/29/73 -- Stardate: 5483.7

Investigating a sector of space where starships have disappeared every 27 years, the Enterprise finds a race of beautiful women who survive by drawing the energy from the men on the ships they have captured.

More Tribbles, More Troubles

10/06/73 -- Stardate: 5392.4

The Enterprise again crosses paths with Cyrano Jones, who this time has tribbles that do not breed, but that do grow to a tremendous size.

The Survivor

10/13/73 -- Stardate: 5143.3

Patrolling near the Neutral Zone, the Enterprise finds a ship manned by Carter Winston, a Federation citizen who has been missing for 5 years; but Winston turns out to really be an alien who can transform its shape at will.

The Infinite Vulcan

10/20/73 -- Stardate: 5554.4

On a recently-discovered planet, the Enterprise crew meets Dr. Keniclius, a scientist from Earth's Eugenic Wars, who kidnaps Spock and makes a giant clone of him with the intention of forcing peace on the galaxy.

The Magicks of Megas-Tu

10/27/73 -- Stardate: 1254.4

While exploring near the center of the galaxy, the Enterprise stops at Megas-Tu, a planet where magic and witchcraft are the norm, and their guide is Lucifer of Earth mythology.

Once Upon a Planet

11/03/73 -- Stardate: 5591.2

Arriving at the shore leave planet for some relaxation, the Enterprise finds that the planet's keeper is now dead and the untended machinery is constructing dangerous images from the crew members' thoughts.

Mudd's Passion

11/10/73 -- Stardate: 4978.5

A love potion concocted by Harry Mudd is accidentally spread through the Enterprise's ventilation system; but a side effect of the potion is that, as it wears off, the affected persons hate each other.

The Terratin Incident

11/17/73 -- Stardate: 5577.3

While exploring a burnt-out supernova, the Enterprise finds a miniature city called Terratin, and soon discover that it is a lost Earth colony that has mutated because of the supernova's radiation and that the Enterprise crew is beginning to shrink also.

Time Trap

11/24/73 -- Stardate: 5267.2

Caught in an ion storm, the Enterprise and a Klingon battlecruiser are drawn into a time warp called the Delta Triangle and must cooperate in order to escape it.

The Ambergris Element

12/01/73 -- Stardate: 5499.9

While exploring the planet Argo, Kirk and Spock are made into waterbreathers by an undersea race, and the venom of a deadly sea snake is the only antidote to return them to their normal selves.

Slaver Weapon

12/15/73 -- Stardate: 4187.3

The shuttlecraft Copernicus lands on the planet Kzin to investigate statis boxes from the extinct Slaver race; but the crew is captured by Kzinti raiders who hope to find a super weapon in the statis boxes.

Beyond the Farthest Star

12/22/73 -- Stardate: 5521.3

Kirk and crew beam aboard a huge derelict starship from an insect race, and learn that the ship's insect crew self-destructed rather than carry a still-living malevolent entity to other worlds.

The Eye of the Beholder

01/05/74 -- Stardate: 5501.2

Beaming down to a planet to search for the crew of the missing ship Ariel, the Enterprise crew is captured by a race of slug creatures and become part of a zoo collection.

Jihad

01/13/74 -- Stardate: 5683.1

Kirk and Spock join a party of aliens to search for and recover a priceless artifact, the loss of which may cause a galactic holy war; but they soon learn that one of the party is a saboteur.