ABC's "Grey's Anatomy" - Season Ten [Getty Images]

GREY'S ANATOMY - "Fear (of the Unknown)" - In the Season 10 finale, the doctors of Grey Sloan Memorial Hospital bid an emotional farewell to the beloved Cristina Yang. A possible act of terrorism rocks Seattle and causes chaos at the hospital. Meanwhile, Meredith makes a life changing decision and one doctor receives shocking news on "Grey's Anatomy," THURSDAY, MAY 15 (9:00-10:00 p.m., ET) on the Walt Disney Television via Getty Images Television Network. (Kelsey McNeal/Walt Disney Television via Getty Images)

Walt Disney Television Kelsey McNeal