Debriefing is used to enhance individual and team communication and to facilitate real-time learning opportunities after a critical event. This study evaluated a charge nurse-facilitated clinical debriefing program used in Emergency Departments (EDs) in Alberta, Canada. Qualitative analyses identified several themes underscoring the impact of the debriefing program – the impacts on clinical practice and patient care, impacts on psychological safety and teamwork, stress management, and the emotional acknowledgement after critical events – and barriers to debriefing.