Popularity: 24
| Creator: | Debora Cahn | 
|---|
| Name | Character | Episodes | 
|---|---|---|
| Rufus Sewell | Hal Wyler | 14 | 
| Rory Kinnear | Prime Minister Nicol Trowbridge | 14 | 
| Keri Russell | Ambassador Kate Wyler | 14 | 
| Ali Ahn | Eidra Park | 14 | 
| Ato Essandoh | Stuart Hayford | 14 | 
| David Gyasi | Foreign Secretary Austin Dennison | 14 | 
| Tim Delap | Byron | 12 | 
| Pearl Mackie | Alysse | 12 | 
| Adam Silver | Howard | 10 | 
| Jess Chanliau | Ronnie | 9 | 
| Celia Imrie | Meg Roylin | 9 | 
| Nana Mensah | Billie Appiah | 9 | 
| Georgie Henley | Pensy | 8 | 
| Penny Downie | Frances Munning | 8 | 
| Michael McKean | President William Rayburn | 5 | 
| Miguel Sandoval | Miguel Ganon | 5 | 
| Graham Miller | Neil Barrow | 5 | 
| Richard Dillane | Tom Libby | 4 | 
| David Bark-Jones | Kemper-Waithe | 4 | 
| Rupert Vansittart | Hoope | 3 | 
| Pandora Colin | Lydia Trowbridge | 3 | 
| John Schwab | Roger Post | 3 | 
| Simon Hepworth | Randall | 3 | 
| Allison Janney | Vice President Grace Penn | 2 | 
| Alysia Reiner | Agent Griffin | 2 | 
| T'Nia Miller | Cecilia Dennison | 2 | 
| Richard Huw | Portman | 2 | 
| Amy Manson | Giselle | 2 | 
| Christine Kavanagh | Gwen Hempill | 2 | 
| Simon Chandler | Sir Merritt Grove | 2 | 
| Adrienne Warren | Georgia | 2 | 
| Gordon Kennedy | Marcus | 2 | 
| Rosaline Elbay | Nora Koriem | 2 | 
| Matilda Ziegler | Olga | 1 | 
| Sam Douglas | Lenkov | 1 | 
| David Yelland | General Edmund Hillison | 1 | 
| Catherine Russell | Jill Klein | 1 | 
| Nancy Carroll | Philippa Pemberton | 1 | 
| James Payton | Brayer | 1 | 
| Tim Berrington | Tyler Randall | 1 | 
| David Alan Basche | Brad Chapman | 1 | 
| Paul Tylak | Malakov | 1 | 
| Colin Mace | Shenk | 1 | 
| Bijan Daneshmand | Rasoul Shahin | 1 | 
| Anne Wittman | Joan Bassett | 1 | 
| Reza Diako | Basir | 1 | 
| Jacqueline Boatswain | Elaine Simms | 1 | 
| Robert Purdy | General | 1 | 
| Akbar Kurtha | Ambassador Desai | 1 | 
| Adam Silver | Howard | 1 | 
| Ian Barritt | Priest | 1 | 
| Glenn Wrage | Lewis Quainton | 1 | 
| Grant Gillespie | Brian | 1 | 
| Olivia Niță | Mitzka | 1 | 
| George Potts | Lon Hammond | 1 |