Gabriel Byrne Bill Ward Actor Elizabeth McGovern Helen Brown Actor Natasha Little Sarah Gresham Actor Daisy Edgar-Jones Emily Gresham Actor Bayo Gbadamosi Kariem Gat Wich Machar Actor Aaron Heffernan Ash Daniel Actor Ty Tennant Tom Gresham Actor Adel Bencherif Colonel Mokrani Actor Gilles Coulier Director, Executive Producer Richard Clark Director Howard Overman Writer, Executive Producer Johnny Capps Executive Producer Julian Murphy Executive Producer