Question: When does callie come in grey's anatomy?
qaPairs: question: What date does Callie Torres first appear in Grey's Anatomy?
answer: February 26, 2006
question: Which episode does Callie Torres first appear in Grey's Anatomy?
answer: "What Have I Done to Deserve This?" (2.19)
question: What date does Callie Torres start to appear in Grey's Anatomy as a series regular?
answer: September 21, 2006
question: What episode Callie Torres start to appear in Grey's Anatomy as a series regular?
answer: "Time Has Come Today" (3.01)