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This Side of Paradise
Series: The Original Series
Story by: Nathan Butler & D.C. Fontana
Teleplay by: D.C. Fontana
Directed by: Ralph Senensky
Novelization in: Star Trek 5 by James Blish
Production information
Episode no.: 1x25
Production no.: 6149-25
First aired: 2 March 1967
Date: 2267
Stardate: 3417.3



The Enterprise is sent to investigate the colonists 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 away team 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."




DeSalleHadleyHarperHarrisonLeila KalomiKelowitzJames T. KirkEd LeslieLeonard McCoyPainter • Elias Sandoval • SpockHikaru SuluNyota Uhura
Referenced only 
Montgomery Scott

Starships and vehicles

USS Enterprise (Constitution-class)


Berengaria VIIOmicron Ceti III

Races and cultures


States and organizations


mint julepStarfleet Medal of Honor


Related stories


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

This article uses material from the "This Side of Paradise" article on the Memory-beta wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.


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