This is perhaps more of a culture question than a language question, but since it is about English usage, I hope it is OK to ask it here.
I'm not American, but I've visited a few American companies where everybody was on first name terms with everybody else.
Now I've see a few episodes of the American TV series "Bones" which takes place in a scientific lab. There, everybody addresses everybody else as "Dr. so-and-so" (or in rare cases "Mr./Ms. so-and-so" if the poor guy doesn't have a PhD.).
This usage seems very unnatural to me compared with my own (very limited) experience with the way people talk together in an American company.
So, is the TV series completely wrong, or is my experience unsual?