This is Episode 1: Foundations I — Neck Levels and Spaces That Change Volumes.We are starting this season with anatomy because in head and neck oncology, anatomy is destiny. If you do not understand the drainage pathways, you cannot draw the target. And if you cannot draw the target, you cannot cure the patient—or worse, you cure them but leave them with avoidable, life-altering toxicity. Today, we are not just memorizing lists. We are building the visual framework—the grid—that you will overlay on every CT scan you scroll through for the rest of your career. This is high-yield for written boards because they love drainage patterns, and it is survival for oral boards because a single missed nodal level on a contouring case is an automatic fail.