UNITED STATES - DECEMBER 13: GREY'S ANATOMY - 'It's the End of the World (As We Know It)' (Photo by Peter 'Hopper' Stone/ABC via Getty Images)

UNITED STATES - DECEMBER 13:  GREY'S ANATOMY - 'It's the End of the World (As We Know It)'  (Photo by Peter 'Hopper' Stone/ABC via Getty Images)