| Name | Character | Episodes |
|---|---|---|
| Simon Reeve | 44 | |
| Sophie Okonedo | 19 | |
| Katy Cavanagh | 19 | |
| Mark Strong | 13 | |
| John Simm | 13 | |
| Gina McKee | 12 | |
| Rupert Graves | 12 | |
| Hermione Norris | 12 | |
| Michael Portillo | 12 | |
| Steven Mackintosh | Narrator | 12 |
| Andrew Neil | 10 | |
| Anita Rani | 10 | |
| David Morrissey | 9 | |
| Paul Rhys | 9 | |
| Andrew Sachs | 9 | |
| Michael Lumsden | 9 |