"We would be glad to have your friend come here to study, but tell him that we teach Chemistry here and not Agricultural Chemistry, nor any other special kind of chemistry. ... We teach Chemistry."

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I think it gets really dangerous, though, to do it on the show. I think that the writers and producers are very much aware of that and the dangers of putting characters together and what that can mean for the show. You know, it's possible it could kill the thing that holds the show together, the chemistry, sexual tension between the two characters.

— Emily Deschanel