The Biologist: Then I have to ask: why did my husband volunteer for a suicide mission?
The Psychologist: So you're asking me as a psychologist?
The Biologist: Yes.
The Psychologist: Then, as a psychologist, I think you're confusing suicide with self-destruction, and they're very different. Almost none of us commit suicide, whereas almost all of us self-destruct. Somehow. In some part of our lives. We drink, or take drugs, or destabilize the happy job... or happy marriage.
The Biologist: [Startles, uncertain whether this was targeted at her]
The Psychologist: But these aren't decisions. They're impulses. And in fact, as a biologist, you're better placed to explain them than me.
The Biologist: What do you mean?
The Psychologist: Isn't the self-destruction coded into us? Imprinted into each cell.
Josie Radek: [to Lena, about the Shimmer] Ventress wants to face it. You want to fight it. But I don't think I want either of those things.
The Biologist: [as she examines multi-coloured flowers] These are very strange.
The Psychologist: Why?
The Biologist: Well, they're all so different. To look at them you wouldn't say that they are the same species... but they're growing from the same branch structure... so it *has* to be the same species. It's the same plant! It's like they're stuck in a continuous mutation.
The Psychologist: A pathology?
The Biologist: Well... you'd sure as hell call it a pathology if you saw this in a human.
[the team kill an alligator & examine it's mouth]
The Biologist: Lena: Whoa. It's exactly the same as the flowers. Look at the teeth. Concentric rows. Something here is making giant waves in the gene pool.
[the paramedic, Anya, holds the alligator's mouth open. She has no tattoo on her arm]
Cass Sheppard: Sharks have teeth like that, don't they?
The Psychologist: Do you think it's a crossbreed?
The Biologist: You can't crossbreed between different species.
Anya Thorensen: Lena, this is getting heavy.
[Later in the movie, Anya has acquired the tattoo]