《地平线系列：性格的真相》 是Helen Nixon导演的作品，发行于2013年（英国），由Michael J. Mosley等主演的一部记录片。
讲述了：Michael Mosley explores the latest science about how our personalities are created - and whether they can be changed. 　　Despite appearances, Mosley is a pessimist who constantly frets about the future. He wants to worry less and become more of an optimist. 　　He tries out two techniques to change this aspect of his personality - with surprising results. 　　And he travels to the frontie...