British Broadcasting Corporation Correspondence on the involvement of Penrose in radio and television programmes including "The Influence of Heredity on Health and Disease", "The Colour Bar", "The Porcupine Man", "The Control of Evolution in Man", "The World of Science: Genetics in Relation To Mixed Marriages", and films on the XYY chromosome for Panorama and schizophrenia for Horizon. Also includes a plan for the three part discussion series on "The Colour Bar", the script for "Genetics in Relation to Mixed Marriages", and invoices for payments related to these programmes. May 1948