Question: When do the interns become residents in grey's anatomy?
qaPairs: question: What is the name of the episode in which interns become residents in Grey's anatomy?
answer: A Change is Gonna come
question: In which episode do the interns become residents in Grey's anatomy?
answer: Season 4 Episode 1
question: What is the air date of the episode when the interns become residents in Grey's anatomy?
answer: September 27, 2007