What if... there were no hairdressers?

I won't be watching tonight's episode of Grey's Anatomy for a while, but based on the ads I can one thing for sure: the greatest change if the doctors had made different decisions in their lives seems to be their hair.  There are some fugly 'dos on tap, and I don't know if I'll be able to focus when I finally do watch the episode as I'll be too distracted.