Star Trek: Deep Space Nine/Recap/S02/E19 Blood Oath

Three Klingons who were blood-brothers of Curzon Dax find Jadzia on Deep Space Nine, and she convinces them to let her go on a Roaring Rampage of Revenge with them to kill the man who murdered the Klingons' sons long ago.

This episode contains examples of:

 * Evil Albino: The villain, a Klingon only known as "The Albino".
 * I Gave My Word: Interesting variation on this with Dax, as her previous host Curzon gave his word to avenge the Klingon's death, also causing unintended Revenge by Proxy.
 * Screw the Rules, I'm Doing What's Right: Jadzia's way of justifying herself to Sisko.
 * What Happened to the Mouse?: Sisko promises dire consequences for Jadzia and her future in Starfleet should she disobey his orders and go after The Albino. Said consequences never take place.
 * Status Quo Is God
 * Sisko is essentially playing the role of Da Chief, telling the Cowboy Cop "If you go out there, it's your badge and gun!" Thereupon the badge and gun would have immediately been handed over... and then handed back when the cop returned victorious, with a mutter of "Didn't have the heart to turn 'em in."