Memory Beta, non-canon Star Trek Wiki

A friendly reminder regarding spoilers! At present the expanded Trek universe is in a period of major upheaval with the finale of Year Five, the Coda miniseries and the continuations of Discovery, Picard and Lower Decks; and the premieres of Prodigy and Strange New Worlds, the advent of new eras in Star Trek Online gaming, as well as other post-55th Anniversary publications. Therefore, please be courteous to other users who may not be aware of current developments by using the {{spoiler}}, {{spoilers}} or {{majorspoiler}} tags when adding new information from sources less than six months old. Also, please do not include details in the summary bar when editing pages and do not anticipate making additions relating to sources not yet in release. 'Thank You


Memory Beta, non-canon Star Trek Wiki

"This Side of Paradise" was the 25th episode of Star Trek: The Original Series in the show's first season, first aired on 2 March 1967. The episode was written by Nathan Butler and D.C. Fontana, directed by Ralph Senensky and novelized in Star Trek 5 by James Blish. A remastered version of this episode was aired in syndication, premiering on 28 July 2007.


The Enterprise is sent to investigate the colony of Omicron Ceti III. After three years of exposure to Berthold rays, the colonists are expected to be dead. The crew is surprised to find the colonists alive, happy and in perfect health. They have a perfect world. A world with no hate, violence, death or disease. They are vegetarians, who only farm what they need. It is a true paradise.

The landing party beams to the surface and meets Elias Sandoval, the leader of the group. He introduces them to Leila Kalomi, a beautiful, young botanist who had fallen in love with Spock six years earlier on Earth. She promises to show Spock how they have survived on the planet with Berthold ray exposure and leads him to a secluded section of the planet where one of the plants spray him with their spores. Leila tells Spock that the plant induces feelings of happiness and love. Spock tells Leila that he can love her and decides to stay with her on the planet. He is happy with Leila, watching clouds, hanging from trees...and engaging in other "activities".

Other members of the crew begin to become infected with the spores and some of the plants are beamed aboard the Enterprise where more of the crew are affected.

Captain Kirk, the last to be infected, is affected by the spores. He prepares to beam down, but his desire to remain on the Enterprise is to strong and destroys the spore influence.

Kirk coxes Spock into beaming back to the ship, where he angers Spock into a fist fight. The anger that wells up in Spock causes the spore influence to subside and Spock returns to normal. They then head to the bridge to begin getting the crew back.

Leila contacts the ship and speaks with Spock; she asks to see the ship. Spock beams her up and she quickly learns that he has been cured. Spock tells Leila that he has a responsibility to the ship and to Jim. She tells him that she still loves him after she realizes that she's lost him.

Using a subsonic sound wave, Kirk and Spock bring the rest of the crew and colonists out from the influence. The colonists realize that the spores have made them stagnant and they plan to relocate.

Back on the bridge, McCoy observes that this is the second time man has been kicked out of paradise. "No no Bones, this time we walked out on our own," Kirk muses. Kirk asks Spock what his thoughts were on Omicron Ceti III. Spock responds, "for the first time in my life, I was happy."



Episode characters

Clifford Brent[1]Vincent DeSalleBill HadleyHarrisonLeila KalomiRogelio KelowitzJames T. KirkRyan LeslieLeonard McCoyRick PainterElias SandovalSpockHikaru SuluNyota UhuraVinci[2]
Referenced only
Montgomery Scott

Novelization characters

DimontTimothy FletcherLeila KalomiJames T. KirkLeonard McCoyElias SandovalSpockHikaru SuluNyota Uhura

Starships and vehicles

USS Enterprise (Constitution-class heavy cruiser)


Omicron Ceti III
Referenced only
Berengaria VII

Races and cultures


States and organizations


Other references

mint julepStarfleet Medal of Honor


Related media


Video releases




published order
Previous episode:
Space Seed
TOS episode produced Next episode:
The Devil in the Dark
Previous episode:
A Taste of Armageddon
TOS episode aired Next episode:
The Devil in the Dark
Previous story:
Let That Be Your Last Battlefield
Star Trek 5
Next story:
Turnabout Intruder
chronological order
Previous Adventure:
Seeds of Rage
Chapters 1 and 2, Section 1
Pocket Next Adventure:
Sonnet from the Vulcan: Omicron Ceti Three
Previous Adventure:
Space Seed
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
The Devil in the Dark

External link

  1. This character was not named in the episode but the same actor, wearing an officer's Starfleet uniform, was addressed as Brent in TOS episode: "The Naked Time". The same actor also played the character of Vinci.
  2. This character was not named in the episode but the same actor, wearing the same operations division Starfleet uniform, was addressed as Vinci in TOS episode: "The Devil in the Dark". The same actor also played the character of Clifford Brent.