Howard Overman Creator, Executive Producer Gabriel Byrne Bill Ward Actor Natasha Little Sarah Gresham Actor Léa Drucker Catherine Durand Actor Adel Bencherif Colonel Mokrani Actor Daisy Edgar-Jones Emily Gresham Actor Bayo Gbadamosi Kariem Gat Wich Machar Actor Ty Tennant Tom Actor Stephen Campbell Moore Jonathan Gresham Actor Aaron Heffernan Ash Daniel Actor Paul Gorostidi Nathan Actor Stéphane Caillard Chloe Dumont Actor Mathieu Torloting Sacha Actor Emilie de Preissac Sophia Actor Gilles Coulier Director, Executive Producer Richard Clark Director H.G. Wells Screenwriter Johnny Capps Executive Producer Julian Murphy Executive Producer Gareth Williams Producer