This mission needs to be Remastered. It would be nice to be able to know something was wrong with Zelle and catch "her" before going around killing Romulan doctors trying to stop a pandemic. I've played this mission once and I won't do it again because I feel like I'm carrying an Idiot Ball.
Not sure if it is possible, but if this mission does get remastered I would like to see this;
If you complete this mission, you no longer see Admiral Zelle at SB39. Replace her with some other officer for those that completed the mission while those who have not continue to see Zelle. It is very immersion breaking to have exposed her, then return to T'Nae and see the traitor still there.