Leonard Nimoy hosts this episode of the anthology series "In Search Of," turning his attention to witch doctors and the folk medicine practiced by traditional healers around the world. The episode presents these healers not as relics but as active practitioners, and it makes the case that some of their remedies have been adopted, or at least studied, inside modern mental institutions, with results that surprised the doctors testing them. Nimoy's narration frames the question directly: does the effectiveness of these practices come from the substances and rituals themselves, or from the patient's belief in the healer performing them? The episode moves through examples of diagnosis-by-ritual and herbal treatment, comparing traditional explanations for illness against clinical ones without fully resolving the gap between them. As with other entries in the series, the tone stays speculative rather than skeptical, treating the unexplained results as worth investigating rather than dismissing. It runs as a single self-contained episode rather than a multi-part study.