This chapter outlines the constitution of the PhD viva panel, including the roles of the examiners (internal and external), the independent Chair, the candidate and the supervisor. The expectations of each player are examined in some detail. The importance of choice of examiners is discussed, and tips on how to investigate the previous research experience of your examiners are given. This chapter also includes some discussion as to whether your supervisor should be present during your viva, how that decision is made and what their role is, if they do attend.