Ghosts of Illyria
The Enterprise is invaded by aliens that drive the crew suicidal. Like Sunshine (2007), they are drawn to light (as NitpickingNerd shows). We learn that Una has been genetically augmented (like Bashir in DS9's Dr. Bashir I Presume). She helps resolves the conflict.
What is the point of this episode? Is it to say that genetic augmentation can be good? That Star Trek was bad? Moore's revenge.
The best part of the story was La'an telling Una she hates her because she hid her identity while La'an did not.
La'an: You lied to me every day for years. What kind of friend is that? You're an abomination. An augment. That's what the other kids called me when they heard my name: augment, monster. Like you are.
Not that is makes a lot of sense that a person in the Federation would hate a descendant of Napoleon (if indeed we are to believe La'an is not augmented). But it would still be an interesting episode, I think.
Unfortunately, the writers could not figure out how to put these ideas in the narrative.
Although derivative, I would say it is nonetheless a cool action episode. Pike, like Sisko before him, defends his crew.