Grey's Anatomy Season 11, Episode 21 How to Save a Life Drama IMDB 8.2 Country United States Duration 43 min Air Date 2015-04-23 Actors Ellen Pompeo (Meredith Grey) James Pickens Jr. (Richard Webber) Chandra Wilson (Miranda Bailey) Kevin McKidd (Owen Hunt) Camilla Luddington (Jo Wilson) Kim Raver (Teddy Altman) Chris Carmack (Atticus Lincoln) Jake Borelli (Levi Schmitt) Anthony Hill (Winston Ndugu) Caterina Scorsone (Amelia Shepherd) Overview Derek witnesses a horrible car accident and springs into action to save lives.