Post deinstitutionalization saw the rise of mental health crisis (MHC) response in Canada. First points of contact for individuals in a MHC are often police services or emergency departments. Professionals in these areas may report feeling unprepared, ill equipped, and a lack of confidence to work with clients in crisis. Police indicate that this work is time consuming, demanding, and "not their job". Entry points can exacerbate the crisis given the chaotic, over-stimulating and frightening environment of emergency departments and the perceived threat of police officers. Despite the outcry of support for working more collaboratively, little is known about the impact Interprofessional collaboration (IPC) has in mental health crisis response systems (MHCRS).