The word “immortal” in the title is not an exaggeration: Henrietta Lacks’ cells, inexplicably but indefatigably, regenerate all the time, making them indispensable for medical and scientific researchers. But who was Henrietta Lacks, and how did her cells get discovered in the first place? Reporter Rebecca Skloot investigates the ethically shocking circumstances around this situation and documents her efforts to engage with the Lacks family to find a measure of justice. Now a film as well.