This is the story of the invention of penicillin and the scientists behind the work. The main character, Howard Florey, races against time to create his magic bullet that will ultimately save the lives of thousands of soldiers during the second world war and win him the Nobel prize. It is a story of intrigue, suspense and bitter rivalry, set mainly in Oxford, England during World War II.
| Actor | Role |
|---|---|
 Jasper BaggErnst Chain | Ernst Chain |
 Brett ClimoNorman Heatley | Norman Heatley |
 Daniela FarinacciMargaret Jennings | Margaret Jennings |
 Peter FlahertyBenson | Benson |
| LLew LutonAlexander Fleming | Alexander Fleming |
 Nikolai NikolaeffJames Kent | James Kent |
| FFred WhitlockHoward Florey | Howard Florey |
| DDaryl WilkinsonEdward Mellanby | Edward Mellanby |