This chapter deals with committee scrutiny of legislation, focusing on common perceptions of the committee stage and its role in bringing about changes to government legislation. In the UK Parliament, legislation which follows the normal passage of a bill will at some point have a committee stage, where Members of Parliament (MPs) or peers can review the text of the bill in detail. It is common for bills to receive their committee stage in public bill committees. The chapter first considers how the committee stage is planned before discussing the legislative, procedural, and political contexts in which bill committees work. It then examines traditional assumptions about committee scrutiny of bills, along with contemporary developments in parliamentary scrutiny of legislation. In particular, it looks at the benefits of evidence-taking, ministerial behaviour in committees, the impact of committees in the latter stages of the legislative process, and the wider function of the committee stage.