"The British Airways Killer" delves into the harrowing case of Joanna Simpson, a privileged heiress murdered by her husband, a pilot for British Airways. The docuseries chronicles the chilling timeline, beginning with the initial phone call reporting her disappearance and culminating in the grim find of her body in a shallow grave within Windsor Great Park. As the investigation unfolds, viewers witness the ensuing legal battles, including a contentious divorce and a prenup that would ultimately reshape British legal precedents, highlighting the profound impact of this tragic crime.