Catalyst brings a mixture of Australian and international stories, from scientific breakthroughs investigating the implications, the ethics, and the politics of the particular issue, to stories about how scientists work in the field. In this DVD release, the Catalyst team present stories on Human Psychology:  Emotional brain Part 1-2; Risky business; Emotional intelligence ; Trust; Positive thinking; Fear; The science of wisdom; Love trap; The science of happiness; Mean girls; Pain of rejection; The extreme sports brain; Workplace stress: stopping the juggernaut; To catch a liar; Corporate psychopaths; and Decisions under fire.