Arizona has a bad day which escalates when she advises one of Callie’s patients on a potential double amputation. Derek goes back on a promise to Callie, and Jo and Stephanie come across an abandoned baby outside the hospital. Meanwhile, the doctors deal with the repercussions of the non-fraternization rule, which include meetings with HR and one doctor’s suspension, on “Grey’s Anatomy,” THURSDAY, MARCH 13 (9:00-10:00 p.m., ET) on the ABC Television Network. “Grey’s Anatomy” stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Sara Ramirez as Callie Torres, Kevin McKidd as Owen Hunt, Jessica Capshaw as Arizona Robbins, Jesse Williams as Jackson Avery, Sarah Drew as April Kepner, Camilla Luddington as Jo Wilson, Gaius Charles as Shane Ross, Jerrika Hinton as Stephanie Edwards and Tessa Ferrer as Leah Murphy. Guest starring Geoffrey Arend as Thom, W. Earl Brown as Herb Cramer, JD Cullum as Lloyd and Alyson Reed as Anna from HR. “Throwing it All Away” was written by Joan Rater and directed by Chris Hayden.