William Walters Sargant (24 April 1907 – 27 August 1988) was a British psychiatrist who is remembered for the evangelical zeal with which he promoted treatments such as psychosurgery, deep sleep treatment, electroconvulsive therapy and insulin shock therapy.Sargant studied medicine at St John's College, Cambridge, and qualified as a doctor at St Mary's Hospital, London. His ambition to be a physician was thwarted by a disastrous piece of research and a nervous breakdown, after which he turned his attention to psychiatry. Having trained under Edward Mapother at the Maudsley Hospital, he worked at the Sutton Emergency Medical Service during the Second World War. In 1948 he was appointed director of the department of psychological medicine at St Thomas' Hospital, London, and remained there un