[DS9] Season 3, Episode 13: Life Support
This episode may be important to watch in terms of continuity, but it’s not that great. The two plots don’t really fit together.
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Read more at Memory Alpha–
Notes:

Winn needs Bareil’s help with negotiating with the Cardassians because she doesn’t know what the heck she’s doin’.

Bareil chooses to stay conscious for a few days rather than be put to sleep with the possibility of eventually being cured.

Bashir asks Winn to stop bothering Bareil, but the negotiations are too important. Bashir suggests (and Winn doesn’t counter him) that she won’t do it alone because she can use Bareil as a scapegoat. Would that really work, blaming the guy that sacrificed his life?

Bashir chooses to not make him full weirdo with another positronic implant, and instead lets him die.
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