Members of the Heaven’s Gate UFO cult believed they were meant to shed every scrap of humanity they had. Paradoxically, they ran a promotional website and made videos promoting their beliefs. Greg and Vanessa dig into the minds of members who joined and later left the cult, as well as those who followed cult leaders Nettles and Applewhite’s shared delusion from the 1970’s until the cult’s dark end in 1997--the largest mass suicide on US soil.