Victor Levin Creator, Writer Domhnall Gleeson Jack Actor, Executive Producer Andrea Riseborough Alice Actor, Executive Producer Aisling Bea Lynn Actor Aimee Lou Wood Maya Actor Amanda Lawrence Dr Feldshue Actor Ella Bruccoleri Louise Actor Ben Dilloway Mark Actor Rachel Adedeji Donna Actor Millie Ashford Celia Actor Tommy McDonnell Danny Actor Mark Cameron Randall Actor Sunil Patel Paul Actor Clare Burt Dr Pell Actor Juho Kuosmanen Director, Executive Producer