Grey's Anatomy Season 4, Episode 16 Freedom (1) Drama IMDB 8.2 Country United States Duration 43 min Air Date 2008-05-22 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 A couple undergoes surgery. Derek and Meredith's clinical trial gets a second shot from a new patient. Izzie helps Alex. McSteamy hooks up with someone.