The Infinite Vulcan

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"The Infinite Vulcan"
Star Trek: The Animated Series episode
Episode no. Season 1
Episode 7
Directed by Hal Sutherland
Written by Walter Koenig
Production code 22002
Original air date October 20, 1973 (1973-10-20)
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"The Infinite Vulcan" is the seventh episode of the first season of the animated science fiction television series Star Trek. It first aired in the NBC Saturday morning lineup on October 20, 1973, and was written by Original Series cast member Walter Koenig ("Ensign Pavel Chekov).[note 1]

In this episode, Captain Kirk must save his First Officer and stop a plan to enforce peace upon the galaxy.


On stardate 5554.4, while exploring the newly discovered planet Phylos for possible Federation colonization, Lt. Sulu picks up a walking plant, called a Retlaw, and is poisoned by a stinger. The alien species that inhabit the planet, who are plantlike beings, approach the Enterprise landing party and their leader, Agmar, saves Sulu's life.

From them the crew discovers that most of the Phylosians were nearly wiped out by a mild terrestrial disease that acted as a plague, brought to the planet by Dr. Stavos Keniclius, a Terran scientist who had survived Earth's Eugenics Wars.

A giant clone of Keniclius, named Keniclius Five, kidnaps First Officer Spock. He believes the galaxy is as war-ravaged as Earth was when he left it. He plans to enforce peace on the galaxy with the aid of a fleet of Phylosian ships and a giant clone of Spock that he's created, at the expense of the original Spock's life. The newly awakened giant Spock clone uses his Vulcan telepathic abilities to mind meld with his original self and save his life. The two Spocks, in concert with Kirk, convince Keniclius that the need for his plan no longer exists.

Spock Two and Dr. Keniclius Five devote themselves to restoring the Phylosian civilization as the original departs with his shipmates.


The "Retlaw" plant that stings Lt. Sulu in this episode is named after the story's author, Walter Koenig ("Retlaw" is "Walter" spelled backward).[1]

  1. ^ This story was expanded into a novelette by science-fiction author Alan Dean Foster as part of the collection, Star Trek Log Two (1974) (ISBN 0-345-25812-6).


In addition to his usual role as Chief Engineer Montgomery Scott, cast member James Doohan supplies the voices of both Dr. Keniclius Five and Phylosian leader Agmar. Nichelle Nichols supplies the voice of the Enterprise computer (instead of usual Majel Barrett) as well as Lt. Uhura.[1]

Cast member Majel Barrett, who usually voices Nurse Christine Chapel and the Enterprise computer, receives screen credit but is not part of this episode.


  1. ^ a b Kurt Danhauser. "The Infinite Vulcan". Retrieved January 15, 2013. 

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