In 1952, a chemist named Rosalind Franklin aimed an X-ray beam at a fiber of DNA and captured an image that would quietly rewrite biology — without her permission, without her knowledge, and ultimately without her name on the prize. This episode reconstructs the four-way race to decode the double helix, the institutional sexism that shaped what credit looks like in science, and why the most important photograph of the 20th century was taken by someone history almost erased. We also sit with the question science rarely asks: what discoveries are sitting in someone's lab right now, unrecognized, waiting for someone else to call them a breakthrough?