Kathleen Early

Derek and Addison face off as they try to save a pregnant patient's life; a surgeon botches a standard procedure; Bailey is shocked by the chief's recommendation letter.

Derek finds an old diary of Meredith's mother; Callie anxiously prepares for her first real date with Erica; Cristina stumbles into a part of the hospital that she and the other residents have never seen.

When someone breaks into a woman's house and murders her while she is video chatting with her parents, Avery's skills are tested when she interviews the only other witness, Tristan Jenkins, (Matt Lanter), an agoraphobic neighbor who is suffering from PTSD following the incident.