Purpose: The purpose of this paper is to study the popular educational broadcasting of Julius Sumner Miller and its intersections with contemporary science policy and education. Design/methodology/approach: The paper draws on archival research including resources so far unused by historians of science or of broadcasting and audio-visual resources of Sumner Miller's broadcasts on Australian, Canadian and American television. It begins by contextualising Sumner Miller as both an academic and broadcaster. The second section interprets the core points of his educational philosophy which he articulated in his written and broadcast works. The final section uses his private papers contextualised by works on the history and philosophy of science to interpret and delineate the disparity between Sumner Miller's influence as a populariser of science and the prevailing trends in scientific policy and teaching. Findings: This paper proposes that reconstructing the themes and recurring points he asserted in his broadcasts reveals disjunction between Sumner Miller's high-profile successes and the contemporary trends in both science policy and science education. This paper interprets the circumstance of an internationally known and influential science populariser who was coterminous with but against the grain of the notion of "big science". He therefore sought to popularise science precisely as it was developing in ways he disparaged. Research limitations/implications: This paper breaks new ground by interpreting the different sources, audio-visual and written, created by and about an influential television broadcaster. Originality/value: Although he was widely and internationally known, and the range of his influence on science communication is generally noted, Sumner Miller's broadcasting and the themes and educational philosophy espoused in it is little researched and contextualised. This paper sharpens understanding of his influence but also his points of intersection and disjunction with scientific culture. Hitherto unused archival resources contribute to this understanding.