ST:DS9, The Sword of Kahless, Episode 409
The Wikipedia summary for this guy is a single paragraph. And that's about all there was to this episode. Blah, blah, Klingon honor, blah blah, over-the-top acting.
I'll say this: my employers would not be nearly as accommodating if I told them I was going to take time off to track down an ancient sword. Or kill an albino.