Art critic Waldemar Januszczak spends four episodes arguing against the label 'Dark Ages,' making the case that the centuries between Rome's fall and the year 1000 produced some of the most inventive art in European history. He travels to Viking burial ships, Charlemagne's chapel at Aachen, and Ravenna's mosaics, handling illuminated manuscripts like the Book of Kells and tracing how barbarian metalwork, Byzantine icon painting, and Islamic geometric design all fed into what later became medieval and Gothic art. Rather than treating the period as an empty gap between classical antiquity and the Renaissance, Januszczak presents it as a time of migration, conversion, and cultural collision that generated new visual languages: interlace patterns, jeweled reliquaries, and manuscript illumination among them. His on-camera style is personal and argumentative, built around close looks at objects and buildings rather than dramatic reenactment. The series closes each episode having built its case object by object, leaving the 'dark' label looking like a label imposed centuries later rather than a description anyone living then would recognize.