Interviews, reconstructions of key experiments and animations are used in this series to explore the biomedical revolution based on the structure of deoxyribonucleic acid - DNA. This fourth videotape focuses on genetic research into cancer. Efforts by Ma ry Claire King, Mark Skolnick and Brian Druker are described. Produced and directed by Carlo Massarella; narrated by Jeff Goldblum. Letterboxed. Closed captioned.