The content breakdown of Untold Legacies is divided into distinct chapters, each dedicated to a different scientist and her contributions to the scientific community. For example, the first chapter explores the life and work of Marie Curie, highlighting her groundbreaking research on radioactivity and her struggles to gain recognition in a male-dominated field. The use of archival footage and interviews with experts adds depth and context to the narrative, creating a compelling story that resonates with viewers on an emotional level.