This article contains spoilers for The Testaments novelLike its predecessor, The Handmaid's Tale, The Testaments sees many talented stars join the cast to help bring Margaret Atwood's complex characters to life. Based on the 2019 novel of the same name, The Testaments is set 15 years after The Handmaid's Tale and follows the lives of three women: Aunt Lydia, Agnes Jemima, and Daisy, who all band together to help the resistance bring Gilead down from the inside. Although Aunt Lydia is considered to be one of the biggest villains in The Handmaid's Tale series, her true allegiances are shown as The Testaments novel revealed that she had secretly been a spy for Mayday all along.
