| Ian McKellen | Narrator |
| Bimbo Hart | Young Scientist |
| Alastair MacIntosh | Victorian Academic |
| David Kelly | Guard |
| Ben Barnes | Young Dunstan Thorn |
| Kate Magowan | Slave Girl / Una |
| Melanie Hill | Ditchwater Sal |
| Charlie Cox | Tristan Thorn |
| Sienna Miller | Victoria |
| Henry Cavill | Humphrey |
| Director | Matthew Vaughn |
| Producer | Lorenzo di Bonaventura; Michael Dreyer |
| Writer | Jane Goldman; Matthew Vaughn |
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