[VOY] Season 3, Episode 18: Darkling
In Darkling we learn that Gandhi, Socrates, Byron, and T’Pau had a secret murderous side to them, I guess. Or that if you combine traits of a bunch of genius’ you get a psycho. This was kind of a silly episode, but not unwatchable enough to get a 1.
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Read more at Memory Alpha
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Notes:

One of them is T’Pau! It looks like they’re trying out some 7/9 style clothes on Kes. Maybe it’s so we barely even notice when 7/9 replaces her.

The Doctor threatens to kill Kes. Kes says that he won’t do it because really all along the Doctor has been trying to protect Kes.

Yeah, but I guess not, because he jumped off the cliff with her. Luckily Janeway manages to fix a thing and beam them out the end.
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