Arizona Robbins, M.D., F.A.C.S. is a fictional character from the medical drama television series Grey's Anatomy, which airs on the ABC in the United States, and is portrayed by Jessica Capshaw. She was introduced in the show's fifth season as an attending surgeon and the new chief of pediatric surgery. Originally contracted to appear in three episodes, Capshaw's contract was extended to the remainder of Season 5, and she became a series regular in Season 6.