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

Sins of the Father (17 Mar. 1990)

TV Episode  |   |  Action, Adventure, Mystery
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Ratings: 8.2/10 from 923 users  
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A Klingon commander comes aboard 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)

Sins of the Father (17 Mar 1990) on IMDb 8.2/10

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Episode cast overview:
Charles Cooper ...
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)  »

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Aspect Ratio:

1.33 : 1
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Did You Know?


This takes place in 2366. See more »


As Worf enters the great hall, his sash is snug and fastened. The moment Duras rips it from him, you can see the sash is slack and has been prepped for easy removal. See more »


Kurn: The two sons of Mogh. Together, we'll restore the family honor.
Lieutenant Worf: No. For the proceedings, you will not reveal your true father.
Kurn: I must.
Lieutenant Worf: You will not!
Kurn: Because it would mean my death as well if you fail? A Klingon's honor means more to him than his life. Perhaps your Human values have clouded your judgment. I insist.
Lieutenant Worf: On this ship, you are my Commander, and I obey. In Council chambers, you are *my* cha'DIch. You do not insist. *You* obey.
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Referenced in Star Trek: The Next Generation: Family (1990) See more »


Star Trek: The Next Generation End Credits
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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