| Name | Character | Episodes |
|---|---|---|
| Adrien Brody | Harry Houdini | 2 |
| Caroline Boulton | Sylvia the Bearded Lady | 2 |
| Megan Dodds | Margery Crandon | 2 |
| David Calder | Sir Arthur Conan Doyle | 2 |
| Evan Jones | Jim Collins | 2 |
| Madeleine Potter | Houdini's Mistress | 2 |
| Kristen Connolly | Bess Houdini | 2 |
| Tim Pigott-Smith | William Melville | 2 |
| Iván Kamarás | Rasputin | 2 |
| Jeremy Wheeler | Rabbi Weiß | 2 |
| Tim Woodward | Sheriff John | 2 |
| Eric Loren | John Wilkie | 2 |
| Tom Benedict Knight | Dash Houdini | 2 |
| Eszter Ónodi | Cecilia Weiss | 2 |
| Linda Marlowe | Lady Doyle | 1 |
| Chrissie Cotterill | 1 | |
| Anthony Cozens | Chauncey Kidd | 1 |
| Richard Rifkin | Farnsworth | 1 |