GREY'S ANATOMY - "Brave New World" - Cristina asks one of the Dermatology doctors about their department since it's so much different than the parts of SGH she's used to, on "Grey's Anatomy," THURSDAY, OCTOBER 16 (9:00-10:01 p.m., ET) on the ABC Television Network. (ABC/RANDY HOLMES) KATHLEEN EARLY, SANDRA OH