Grey's Anatomy turns 15

ET Canada

The long-running ABC medical drama is the third iconic TV show celebrating a 15th anniversary this week, joining The Office and the Doctor Who revival. Shonda Rhimes' Dr. Meredith Grey and a crew of lusty surgeons were first introduced on March 27, 2005. Here are the most memorable moments from Grey's Anatomy and here's a comparison of the cast then and now. ALSO: Kim Raver speaks out on last night's Grey's shocker.