Voyager's single best episode?

[Tomalak]

Course Oblivion was gut wrenching because there was no record other than a distress call, but at least there was the possibility voyager may have found out.

Is there a more downbeat ending in all of Trek? Normally they would have had Voyager find the probe at least.

 

[Farscape One]

It certainly lived up to the episode title.