ST:TNG, Redemption, Episode 426
You know, the more episodes I watch, the more I like the guy who plays Gowron. Watching as a kid, the character always struck me as sort of a conniving shit, and also an asshole to the Federation despite their repeated help. Considering that the Enterprise abandoned Gowron's ship to destruction at the outbreak of a Klingon civil war (to keep the Federation from choosing sides in the civil war), I can sorta see why.
Also, Klingon females are hilarious.