A documentary about A Liar's Autobiography: The Untrue Story of Monty Python's Graham Chapman. A documentary about A Liar's Autobiography: The Untrue Story of Monty Python's Graham Chapman. A documentary about A Liar's Autobiography: The Untrue Story of Monty Python's Graham Chapman. A documentary about A Liar's Autobiography: The Untrue Story of Monty Python's Graham Chapman.