Sharareh Drury / People: Keira Knightley Unravels a Murder Mystery at Sea in Twisty The Woman in Cabin 10 Trailer - 'The Woman in Cabin 10,' based on the Ruth Ware novel, is on Netflix Oct. 10 - Keira Knightley stars as a journalist who believes she witnessed a murder on a luxury cruise in The Woman in Cabin 10, adapted from the 2016 novel by Ruth Ware