HBO Max’s Dune prequel series, The Sisterhood, has cast Emily Watson (Chernobyl) and Shirley Henderson (Harry Potter) in leading roles, Variety reports. Set 10,000 years before the events of Dune, the series is based on Brian Herbert and Kevin J. Anderson’s 2012 novel Sisterhood of Dune. Officially titled Dune: The Sisterhood, the show was ordered to series at HBO Max in June 2019. Per the official logline, it “follows the Harkonnen Sisters as they combat forces that threaten the future of humankind, and establish the fabled sect known as the Bene Gesserit.” Watson and Henderson will portray Valya Harkonnen and Tula Harkonnen, respectively. Per the character descriptions, the sisters “have risen to power in the Sisterhood, a secret organization of women who will go on to become t...