This video, produced by the Partnership for Patient Safety and the Harvard Risk Management Foundation, presents a series of missteps involving a healthy obstetric patient and her unborn infant. Based on actual facts drawn from the experience of the Risk Management Foundation of the Harvard Medical Institutions, this 18-minute film illustrates the value of having a systems awareness in medicine. Deeper explorations of teamwork, hand-offs, communication skills, and managing the authority gradient provide rich examples for viewers. Parts 2 and 3 complete the video series.