Number One Fan (season 1)

In the first season of Number One Fan, viewers meet Lucy Logan, a glamorous morning TV host with a massive social media following and a seemingly perfect life. After she is rescued from a violent mugging by a woman named Donna, Lucy welcomes her as a grateful fan and even invites her onto her show. As Donna gradually insinuates herself into Lucy's world, the friendship turns darker and more invasive, exposing Lucy's carefully crafted image and forcing her to confront a terrifying obsession that will not let her go.