Transnational crime is regarded as a major threat to contemporary political and economic regimes. Concerns about the cross border activities of criminal organisations, in particular, has become a key feature of the global political agenda in recent years. This had led to the creation of a number of international agreements, institutions, and legislative proposals to encourage inter-state cooperation against transnational crimes. Yet, concerns and responses to transnational crimes differ across diverse regions, and with regard to different forms of crime. Taking an interdisciplinary perspective, this module will explore the emerging field of transnational criminal law, examining the challenges of transnational law enforcement. The module will begin by introducing students to key theoretical concepts, political debates, and principles of transnational criminal law. We will then explore some of the more substantive transnational crimes, such as drug trafficking, money laundering, human trafficking and migrant smuggling. In addition to examining the nature and extent of these crimes, we will consider the strengths and limitations of current legal and policy responses.