Documentaries often shape how students understand history, but every documentary reflects choices about perspective, evidence, and interpretation. In this article, educators explore how corroboration and comparison help students move beyond passive viewing to evaluate historical narratives critically. Readers will examine practical strategies for pairing documentary clips with additional sources, identifying differing perspectives, and guiding students to analyze how interpretation changes when new evidence is introduced. By emphasizing corroboration, sourcing, and inquiry, this article helps teachers transform documentaries into opportunities for deeper historical thinking and evidence-based analysis.