* Zenon selfishly snapping at her parents when she is caught taking a "middle-of-the-night spacewalk".
--> '''Zenon''': You guys are constantly begging me to take a greater interest in science. Then, tonight when I finally do, everyone gets all gaseous on me!
--> '''Astrid''': Taking off on an unauthorized, middle of the night space walk is hardly what we had in mind!
--> '''Mark''': Sweetheart, what if your tether broke while you were out there? What if we got bombarded by a sudden meteor shower?
--> '''Zenon''': I can handle myself, I'm 13!
--> '''Mark''': Then you better start ACTING like it.
* When Zenon has to be sent to Earth for being in a class four zone (the databanks) after spying on Lutz.
--> '''Zenon''': I honestly think if you put these [stress helmets] on, it'll help all of us...or maybe not.
--> '''Astrid''': You have put us in a very difficult position, Zenon. You can't imagine how much I don't want to do what I have to do now. But you haven't left us any choice.
--> '''Zenon''': What?
--> '''Mark''': I'm sorry, Z. Your mother an-and I, have contacted your Aunt Judy.
--> '''Zenon''': Aunt Judy? She hates space. She hates to travel. And you want to bring her up here to be my keeper?
--> '''Mark''': You don't get it, Z. We're grounding you.
--> '''Zenon''': I understand that.
--> '''Mark''': No Z, I mean we're really GROUNDING you.
--> '''Zenon''': What? No! No, this... You can't... Mom? Mom?
--> '''Astrid''': I'm sorry, honey.
--> '''Zenon''': Dad?
* When Zenon sees that all hope is lost for the space station after missing her shuttle.
--> '''Greg''': What now?
--> '''Andrew''': Think we oughta go to the cops.
--> '''Zenon''': Yeah right! My own parents didn't believe me, why should they?! It's over! When those nanoviruses chew through all the systems, everyone up there will be...finished.
* The scene with the aliens and their spaceship in Z2 never fails to bring a tear to this troper's eye.