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

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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 »


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Release Date:

1 December 1967 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.33 : 1
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Did You Know?


When Scotty is in command of the ship, they receive a distress call from a Federation freighter, the S.S. Deirdre. Deirdre is the name of James Doohan's second daughter. 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 »


Scott: [as acting commander of the "Enterprise," attempting to hail a Klingon vessel that has been menacing them] This is the commander of the USS "Enterprise." Identify yourself and your intention. Acknowledge!
Scott: [after no reply is received] Close out the frequency, Lieutenant.
Sulu: Phaser banks are ready, sir.
Scott: And we'll go right down their throat if necessary. Let's see if they have the belly for it.
See more »

Alternate Versions

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


Featured in William Shatner's Star Trek Memories (1995) See more »

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User Reviews

What moron designed the Capellans' costumes??
25 June 2019 | by SusanJLSee all my reviews

Found it hard to take this episode seriously looking at those ludicrous outfits!!! Warriors with lavender and neon orange fake-fur accessories??? What moron designed those costumes???? Almost ruined the whole episode for me!! More suitable for Laugh-In!!!

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