TNG "Lessons"
Pretentious title much?
Picard finds love then must send them on a dangerous mission where his ability to be impartial breaks. The episode works primarily because of the actors, and ends up being a decent dramatic episode for the most part. That said, it seems weird how in the episode where Picard finds romance with Lt Daren, her area of responsibility also ends up crucial to the story - including a spot for Daren at the big meeting table when Stellar Cartography had never been there before. It points to one of the primarily structural weaknesses of the episode, namely that it should have had more episodes to develop the Daren and her department in a natural way so that the final conflict with the solar wind (or whatever) felt natural. While yes, most episodes were done-in-ones in the era, this type story I think would be better percolating for a bit; Lt. Daren and Stellar Cartography should have had multiple appearances leading to this culmination of the arc for her character and relationship with Picard.
Also, Troi was in her uniform in this episode for those counting at home.