Monday, April 11, 2022 at 11 p.m. on KPBS TV / On demand with KPBS Passport! The story of one warmhearted, stubborn man’s visionary quest to find a cure for cancer, this film is an homage to an unconventional superhero — a pioneering, harmonica-playing scientist from a small town in Texas who triumphed over a doubtful medical establishment to save innumerable lives around the world and win the Nobel Prize.