Watch the official trailer for The Better Sister, a gripping new thriller series from Prime Video starring Jessica Biel and Elizabeth Banks. Based on the bestselling novel by Alafair Burke, this eight-episode limited series delves into a tangled web of family betrayal, addiction, and murder. Chloe's seemingly perfect life is shattered by her husband's brutal killing, forcing her to reconnect with her estranged sister Nicky. Together, they must unravel dark secrets that could destroy them both.