本片是一部英国纪录片片，由Helen Nixon导演，由Michael J. Mosley主演。
剧情简介：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 frontiers of genetics and neuroscience to find out about the forces that shape all our personalities.
外文名：Horizon: The Truth About Personality
别名：don't worry，be happy
类型：纪录片
地区：英国
导演：Helen Nixon
编剧：Nicola Cook
演员：Michael J. Mosley
