How To Make Better Decisions is a quirky little documentary narrated by Peter Capaldi that, very tongue-in-cheek, claims to be able to teach you how to make rational decisions when facing life's toughest choices. In other words, it shows how our emotions play a bigger impact on our decisions and the skills needed to notice we're doing that.

According to science: We are bad at making decisions. Our decisions are based on oversimplification, laziness and prejudice. And that's assuming that we haven't already been hijacked by our surroundings or led astray by our subconscious!

Featuring exclusive footage of experiments that show how our choices can be confounded by temperature, warped by post-rationalisation and even manipulated by the future, Horizon presents a guide to better decision making, and introduces you to Mathematician Garth Sundem, who is convinced that conclusions can best be reached using simple maths and a pencil!