Millais Culpin was an English physician and psychotherapist renowned for his contributions to the field of mental health, particularly during the tumultuous years of World War I. Born in Ware, Hertfordshire, he dedicated much of his professional life to understanding and treating psychological trauma, a focus that became particularly crucial as he worked with shell-shocked soldiers at the Ewell War Hospital. His experiences during the war not only shaped his medical practice but also influenced the broader understanding of psychological conditions in the context of warfare, marking him as a significant figure in early 20th-century psychotherapy. Culpin's legacy extends beyond his wartime contributions; he is commemorated with a blue plaque in Meads, Loughton, recognizing his impact on mental health treatment. His life and work have been depicted in popular culture, notably in the television series Casualty 1907 and Casualty 1909, where he is portrayed as a character, highlighting his lasting influence on both medicine and society's perception of mental health issues. Culpin's dedication to his patients and his pioneering approach to psychotherapy have left an indelible mark on the field, making him a notable figure in the history of medical treatment for psychological trauma.