Grey's Anatomy Season 2

Season two of Grey's Anatomy, an American medical drama television series developed by Shonda Rhimes, began airing on September 25, 2005 on ABC. The season concluded on May 15, 2006, after 27 episodes aired. Season two regular cast members include Ellen Pompeo, Sandra Oh, Katherine Heigl, Justin Chambers, T.R. Knight, Chandra Wilson, James Pickens, Jr., Isaiah Washington, Patrick Dempsey and Kate Walsh becoming series regular after guest starring in season one's finale and the first five episode of season two.

The first five episodes of the season were initially planned to be within the first season with the episode "Bring the Pain" as season one finale. According to Rhimes after airing the ninth episode of the show, the ratings, the timeslots and the really great audience meant that they have to end the season with that episode, and the cliffhanger with the coming of Derek's estranged wife fit perfectly. The season received positive critics and reception, and this season performed better than the previous one. The season two continues from where season one left, Derek's estranged wife Addison arrive at Seattle for business but decides to reconcile her relationship with Derek. From this point Derek decides to try repair his relationship with his wife leaving Meredith devastated. Other stories include, Izzie and Alex's relationship, George's final move on Meredith and his relationship with orthopedic surgeon Callie, Miranda Bailey's pregnancy, Cristina's relationship with Burke that develops very quickly, and the arrival of heart patient Denny Duquette who develops a relationship with Izzie and eventually proposes to her, before his condition gets worse and he dies. Info from Wikipedia