| Name | Character | Episodes |
|---|---|---|
| David Suchet | 2 | |
| Eddie Redmayne | 1 | |
| Warwick Davis | 1 | |
| Ian McKellen | 1 | |
| Hugh Laurie | Himself | 1 |
| Hugh Laurie | 1 | |
| Griff Rhys Jones | 1 | |
| John Sergeant | 1 | |
| Andrew Lloyd Webber | 1 | |
| David Walliams | 1 | |
| Jonathan Ross | 1 | |
| Bruce Forsyth | 1 | |
| Will Young | 1 | |
| Alan Davies | 1 | |
| Robson Green | 1 | |
| Terry Jones | Himself | 1 |
| Gary Kemp | 1 | |
| Lenny Henry | 1 | |
| Paul O'Grady | 1 | |
| Alfie Boe | 1 | |
| Michael Portillo | 1 | |
| Rick Wakeman | 1 | |
| Emeli Sandé | 1 | |
| Len Goodman | 1 |