She is not only the Science Consultant but also a proper comic book geek, and she is the only one who (according to Jim "Sheldon" Parsons) really knows what they are talking about when the script goes nerdy! FYI, this came from an interview in this months SFX magazine.
The show is seen as boys being boys, as they are nerds interested in science and comic books, but none of the actors are. She really is and I love that because it shows that girls can be clever and geeky too, and that its a good thing.
I just wish that they would make more out of Amy so she could be a real role model for girls who are into that stuff and pretend they aren't because it isnt "cool".