In every modern society the laws that govern its citizens are complex and vital. From traffic law and tax law, through to criminal and family law, there are laws that relate to every part of our lives. Laws play a fundamental role in keeping social order in the world, but what happens when society changes and a law becomes outdated? In this programme we examine how laws are reviewed and changed; we delve into why we change laws; the role of formal law reform bodies, individuals, parliament and courts in changing the law, as well as the factors that sometimes delay change.