Claire Danes Cora Seaborne Actor Tom Hiddleston Will Ransome Actor Clémence Poésy Stella Ransome Actor Frank Dillane Luke Garrett Actor Hayley Squires Martha Actor Dixie Egerickx Jo Ransome Actor Greta Bellamacina Trainee Surgeon Guest Star Andrea Cornwell Producer Clio Barnard Executive Producer Hakan Kousetta Executive Producer