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David Tennant portrayed R. D. Laing, a Scottish psychiatrist, in the 2017 film "Mad to Be Normal." The film chronicles Laing's pioneering work in the 1960s, challenging conventional psychiatric practices and advocating for a more compassionate approach to mental illness. Tennant's performance captures Laing's charisma, intellectual brilliance, and unwavering belief in the inherent dignity of those suffering from mental distress.