HARDtalk

Chris Costner Sizemore (2009x35)

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Chris Costner Sizemore has been called the most famous psychological case study in history. Growing up, her young mind was inhabited by a host of different personalities. Her extraordinary experiences gave rise to a newly defined mental illness, multiple personality disorder, and her story was turned into an Oscar-winning movie. Five decades after the first diagnosis are we any closer to understanding the mysterious rise of the alter ego? Chris Costner Sizemore talks to Stephen Sackur.