Howard Overman Creator, Writer, Executive Producer Gabriel Byrne Bill Ward Actor Elizabeth McGovern Helen Brown Actor Natasha Little Sarah Gresham Actor Michael Marcus Dan Actor Georgina Rich Rachel Actor Daisy Edgar-Jones Emily Gresham Actor Ty Tennant Tom Gresham Actor Léa Drucker Catherine Durand Actor Gilles Coulier Director, Executive Producer Richard Clark Director Johnny Capps Executive Producer Sara Johnson Executive Producer Julian Murphy Executive Producer