Star Trek (1966–1969)
17 user 6 critic

Friday's Child 

The Federation clashes with the Klingon Empire over mining rights to Capella IV. A sudden coup between its warrior-minded inhabitants forces Kirk's party to flee with the now dead leader's pregnant wife.


Joseph Pevney


Gene Roddenberry (created by), D.C. Fontana

Watch Now

With Prime Video





Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
Julie Newmar ... Eleen
Tige Andrews ... Kras
Michael Dante ... Maab
James Doohan ... Scott
George Takei ... Sulu
Nichelle Nichols ... Uhura
Cal Bolder Cal Bolder ... Keel
Ben Gage Ben Gage ... Akaar
Walter Koenig ... Chekov
Kirk Raymond Kirk Raymond ... Duur (as Kirk Raymone)
Bob Bralver Bob Bralver ... Grant (as Robert Bralver)


The Federation is in competition with the Klingons for an alliance with the inhabitants of Capella IV. The Capellans are a warrior tribe and there is dissension among them as to who to sign the mining rights treaty with. McCoy is familiar with their customs having once spent several months there. When a Capellan, who clearly favors the Klingons, stages a coup, Kirk, Spock and McCoy flee with the now dead leader's wife, who is about to give birth. Meanwhile, the Enterprise receives a distress call from a Federation vessel under attack and, with Scotty in command, leaves orbit. Written by garykmcd

Plot Summary | Plot Synopsis


TV-PG | See all certifications »


Official Sites:

Official site





Release Date:

1 December 1967 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:




Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


A musical in-joke: after Mr Chekhov claims the saying 'Fool me once, shame on you. Fool me twice, shame on me' emanates from Russia, a theme from Pyotr Ilyich Tchaikovsky's Fourth Symphony is heard. See more »


After Kirk and Spock use the transmitters to create a cascade of rocks we can see some boulders shift position nearly the end of the rockslide, due to a cut that skips some frames. See more »


McCoy: Does Maab know that the Klingons are our sworn enemies, by their own words?
Maab: We understand only that he also offers things of value for our rocks, that he has freely handed us his weapons and other devices. Will you do the same?
Captain James T. Kirk: Let me call my ship to inform them...
Kras: bring down an attack upon their village? It is as I told you, Maab: Earthmen fear to bargain honestly.
See more »

Alternate Versions

Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Silly and Uninteresting
29 April 2014 | by HitchcocSee all my reviews

You know how you look at the TV listings and you see that Star Trek is on and you're all excited because you are in the mood. And then it turns out to be this episode. What a disappointment. The Klingons have arrived on a planet inhabited by a similar race. The guys are in danger. There is an insufferable pregnant woman who takes a shine to McCoy (I never cared all that much for Julie Newmar but I guess being on the original "Batman" helps to canonize you. Scotty does a great job of keeping things focused, making wise decisions. There is a lot of cultural byplay. In the end, I couldn't have cared less. McCoy makes a bit of a fool of himself as he talks baby talk. Don't bother.

8 of 20 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 17 user reviews »

Contribute to This Page

Stream Trending Movies With Prime Video

Enjoy a night in with these popular movies available to stream now with Prime Video.

Start your free trial

Recently Viewed