Star Trek (1966–1969)
25 user 12 critic

Balance of Terror 

The Enterprise must decide on its response when a Romulan ship makes a destructively hostile armed probe of Federation territory.



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Episode complete credited cast:
Paul Comi ...
Barbara Baldavin ...
Garry Walberg ...
The Centurion


The Enterprise answers a distress call from Federation Outpost #4, a monitoring station on the Federation side of the neutral zone with the Romulan Empire. The outposts were established over a century ago and no one has actually seen a Romulan. The Romulan vessel seems to have some type of high energy explosive device as well as a cloaking device to make the ship invisible. When it appears that Romulans bear a strong resemblance to Vulcans, Kirk must deal with a rebellious crew member. He must also engage in a dangerous cat and mouse game with a very intelligent Romulan commander. Written by garykmcd

Plot Summary | Plot Synopsis


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Release Date:

15 December 1966 (USA)  »

Company Credits

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


The Romulan weapon is described by Spock as an "enveloping energy plasma". See more »


While officiating at a wedding ceremony, Captain Kirk says, "Since the days of the first wooden vessels, all ship-masters have had one happy privilege: that of uniting two people in the bonds of matrimony." This is false; whatever the fictional Starfleet's regulations may be, the real life captains of seagoing ships have no particular power to perform weddings and, at least for the US, the UK, and Russia alias USSR, there is no evidence that they ever did. In fact the navies of these and various other countries have always specifically prohibited their commanding officers from performing marriage ceremonies. See more »


Mr. Spock: Sweeping the area of Outpost #2. Sensor reading indefinite. Double-checking Outpost #3. I read dust and debris. Both Earth outposts gone and the asteroids they were constructed on - pulverized.
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Referenced in Get a Life! (2012) See more »


Theme From Star Trek
Written by Alexander Courage
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User Reviews

Episodes like this one are what makes Star Trek great!
12 May 2006 | by (Western Desert United States) – See all my reviews

This has to be one of my 3 favorite Episodes from the Original TV Series.

What makes it great is the battle of wits between The Romulan Commander and Kirk, as well as the top-notch acting from Mark Lenard, who later went on to play Spock's father in other TV Episodes and movies. This is a case where those around rose to the level of the talent around them, and Shatner, Nimoy, and the whole cast deliver an outstanding performance in this episode.

The writing and plot are also excellent, and I love the direct approach used to show us the characters, and the feelings and thoughts of those characters, and how freely they are expressed by the actors.

This very entertaining episode ranks 10 out of 10. AWESOME!! Desert-Buddha

19 of 23 people found this review helpful.  Was this review helpful to you?

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