This whole episode is a piece of art. The last scene is incredible at setting up the atmosphere and the picture of the impaled Aurene is trully traumatic. And then I heard my commander saying "I don't know..." while the screen gets black, and you can't help but feel desperate and shocked...
Also the music with the chorus all along is really impactful, great work from Maclaine on the soundtrack from this episode (I suggest you read the interview released earlier, very interesting).