This paper describes how audiovisual media have influenced the way students have learned--or failed to learn--at the Open University at Walton Hall. The paper is based in part on results from a large body of research that has repeatedly demonstrated the interrelatedness of a wide range of factors in determining how or what students learn from audiovisual media. For instance, the administration's policy toward the assessment of broadcast material will affect not only the way many students approach the programs, but may determine whether or not a student will watch at all; the benefit a student obtains from a program will be affected by how much he has read in the correspondence texts; and that in turn will be influenced by the timing of the TMAs (tutor marked assignments). Primarily a literature review, this paper discusses the following topics: general theory and research relevant to the Open University; the roles of audiovisual media in Open University learning; case studies and documentaries; television as reinforcement; delivery of instruction; students' prior experience with learning from television and radio; student control over audiovisual media; relevance of program material; individual differences; and the need for broadcast notes. An extensive bibliography is included. (THC)