Star Trek: The Next Generation: Season 3, Episode 17

Sins of the Father (17 Mar. 1990)

TV Episode  -   -  Action | Adventure | Sci-Fi
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A Klingon commander boards the Enterprise in an officer exchange program initiated by Starfleet, much to the chagrin of the crew.



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Title: Sins of the Father (17 Mar 1990)

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Episode cast overview:
Charles Cooper ...
Patrick Massett ...
Thelma Lee ...
J. Teddy Davis ...
Transporter Technician (as Teddy Davis)


Commander William T. Riker is charged with hosting Klingon commander Kurn, who takes his place as first officer as part of an exchange program. As expected his ruthlessly authoritative command style gets on everyone's nerve, but the worst is yet to come: Kurn reveals himself as Lieutenant Worf's younger brother, and demands he joins him in dealing with a blood feud, as their late father's honor is challenged by accusations of treason to the Empire in league with the Romulans during a bloody attack. The Enterprise sets course to the Klingon first city, while Picard fears legal and diplomatic repercussions. Data finds indications the Klingon records were doctored, possibly at Klingon High Council level, so the Enterprise crew sets out to find out the truth... Written by KGF Vissers

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Release Date:

17 March 1990 (USA)  »

Company Credits

Production Co:

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Technical Specs

Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


This episode won an Emmy in 1990 for Outstanding Art Direction in a Series. The award was given to Richard D. James for production design and Jim Mees for set decoration. See more »


K'mpec gives a command in Klingon - something akin to "in my chambers!" after Kahlest is brought in as a witness. His mouth doesn't move when he gives the command. See more »


[Picard informs Worf that he will go into the city's old quarter to look for Kahlest]
Lieutenant Worf: It is too dangerous. You must not go alone.
Captain Jean-Luc Picard: Hey... I'm your cha'DIch.
See more »


Referenced in Star Trek: The Next Generation: Reunion (1990) See more »


Star Trek: The Next Generation Main Title
Composed by Jerry Goldsmith and Alexander Courage
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User Reviews

25 May 2007 | by (Los Angeles) – See all my reviews

The initial screenplay did not contain the character Kurn, who was added later as a compromise. The original script had the Enterprise being lured to an ambush by three Klingon ships loyal to Duras. The idea for the script came from the fact that Star Trek archivist, Richard Arnold, was a descendant of Benedict Arnold. Richard Arnold had told me that while Benedict Arnold became a general in the British Army, his sons were never allow to join for the simple reason that their father was a known traitor and it was feared they would be also. "Sins..." was the first script to take place (in part) on the Klingon's home-world, Klinga. It is also the only episode of any of the various Star Trek series to win an Emmy and was one of Ron D. ("Battlestar Galactica") Moore's first staff assignments for ST:TNG. At the time, I thought he did a great job. In hindsight, I probably couldn't have hoped for anyone better to do the re-write.

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