This biography covers the life of Marshall Applewhite, the leader of the Heaven’s Gate religious group. After meeting Bonnie Nettles in the early 1970s, Applewhite developed a complex theology merging Christian eschatology with beliefs in extraterrestrial salvation. The pair led a nomadic lifestyle, eventually establishing a highly disciplined community where members renounced worldly attachments to prepare for a physical or spiritual transition. Following the death of Nettles and the appearance of Comet Hale–Bopp, Applewhite convinced his followers that a spaceship was arriving to collect their souls. This conviction culminated in a mass suicide in 1997, which remains the largest event of its kind on United States soil. Experts continue to study the movement to understand Applewhite's charismatic influence and the methods he used to maintain total control over his disciples.