Debora Cahn Creator Keri Russell Kate Wyler Actor, Executive Producer Rufus Sewell Hal Wyler Actor David Gyasi Dennison Actor Ali Ahn Eidra Graham Actor Rory Kinnear Trowbridge Actor Ato Essandoh Stuart Actor Allison Janney Grace Penn Actor Celia Imrie Margaret "Meg" Roylin Actor Michael McKean William Tresselt "Bill" Rayburn Actor Miguel Sandoval Miguel Ganon Actor Aidan Turner Callum Ellis Actor Tracy Ifeachor Thema Aseidu-Dennison Actor Nana Mensah Billie Appiah Actor Janice Williams Executive Producer Simon Cellan Jones Executive Producer