 Derrick s sister comes to Seattle for a visit, and seems more into the extended family and gossip surrounding his divorce from Addison than into him. Meanwhile, the interns are not the only ones jealous of Cristina s opportunity to scrub in with Preston on a "Humpty Dumpty" procedure, and Bailey takes it personal when she learns she s been scrubbed, herself. George works with Addison on a very unusual case and Alex envies him.