As Tula contends with the stunning reveal of Desmond's true identity, the acolytes uncover a devastating long-held secret about the Sisterhood.

Cast: Olivia Williams, Travis Fimmel, Jodhi May, Sarah-Sofie Boussnina, Chloe Lea, Chris Mason, Mark Strong, Jade Anouka, Edward Davis, Faoileann Cunningham, Aoife Hinds, Jessica Barden, Camilla Beeput, Barbara Marten, Earl Cave, Emma Canning, Charithra Chandran, Yerin Ha