This chapter explains how to bring a PhD to completion through the dissertation and the defense. It outlines how to turn years of research, often spread across multiple papers, into a single coherent document with a clear narrative and well-scoped contributions. It then describes the purpose of the defense across common formats, emphasizing that the goal is usually to assess understanding and judgment rather than to “catch” mistakes. The chapter gives practical guidance on preparation, crafting a focused presentation, handling questions with clarity and honesty, and responding to typical post-defense revisions. The overarching message is that the defense is a transition into professional independence, not just a final exam.