Chart rounds with peer review has long been a standard (some would say historical) practice in radiation oncology, and generally has been a feasible and effective quality control tool. Within radiation oncology, chart rounds remains a requirement by the American Society for Radiation Oncology, American College of Radiology, and the American Association of Physicists in Medicine. 1 Chart rounds with peer review commonly is a weekly meeting where treatment plans of patients who are in their first week of treatment are peer reviewed; that is, a retrospective quality control measure. The effectiveness of this approach has never been prospectively assessed.In this issue of Practical Radiation Oncology, Talcott et al from the Yale School of Medicine, Department of Therapeutic Radiology report "A Blinded, Prospective Study of Error Detection During Physician Chart Rounds in Radiation Oncology" to address this knowledge gap. 2 Twenty treatment plans with simulated errors were covertly presented at their weekly chart rounds over 9 weeks. The types of errors were selected from the Radiation Oncology Incident Learning System database and thus were realistic (eg, wrong target identified, normal structures not spared, inadequate target coverage, dose/fractionation pattern incorrect, previous treatment not considered, and problem with imaging used for planning)din other words, the usual suspects that keep us awake at night. Plus, most of the errors were designed to be "highly detectable." Only 55% of the errors were detected. This is a sobering and critically important contribution to our field, and the investigators should be commended for their work.