| Some of literature's most terrifying characters, including Dr. Frankenstein, Dorian Gray, and iconic figures from the novel Dracula are lurking in the darkest corners of Victorian London. Penny Dreadful is a frightening psychological thriller that weaves together these classic horror origin stories into a new adult drama. |
| Name | Character | Episodes |
|---|---|---|
| Eva Green | Vanessa Ives | 27 |
| Josh Hartnett | Ethan Chandler | 27 |
| Timothy Dalton | Sir Malcolm Murray | 27 |
| Billie Piper | Lily / Brona Croft | 27 |
| Rory Kinnear | John Clare / The Creature | 27 |
| Reeve Carney | Dorian Gray | 27 |
| Harry Treadaway | Dr. Victor Frankenstein | 27 |
| Danny Sapani | Sembene | 18 |
| Simon Russell Beale | Ferdinand Lyle | 14 |
| Sarah Greene | Hecate Poole | 13 |
| Douglas Hodge | Bartholomew Rusk | 13 |
| Helen McCrory | Madame Kali | 12 |
| Jack Hickey | Junior Inspector | 11 |
| Patti LuPone | Dr. Seward | 9 |
| Wes Studi | Kaetenay | 9 |
| Shazad Latif | Dr. Henry Jekyll | 8 |
| Christian Camargo | Dr. Alexander Sweet | 7 |
| Samuel Barnett | Renfield | 7 |
| Jessica Barden | Justine | 6 |
| Tamsin Topolski | Lavinia Putney | 5 |
| Ruth Gemmell | Octavia Putney | 5 |
| Olivia Chenery | Witch #2 | 5 |
| Perdita Weeks | Catriona Hartdegen | 4 |
| Alex Price | Proteus | 4 |
| David Haig | Oscar Putney | 4 |
| Noni Stapleton | Gladys Murray | 4 |
| Sebastian Croft | Boy Familiar | 3 |
| Stephen Lord | Warren Roper | 3 |
| Brian Cox | Jared Talbot | 2 |
| Ronan Vibert | Sir Geoffrey Hawkes | 2 |
| Sebastian Croft | Boy Familar | 1 |
| Alun Armstrong | Vincent Brand | 1 |
| Noah Jupe | Charles Chandler | 1 |
| Patti LuPone | Joan Clayton | 1 |
| Tantoo Cardinal | Old Native American Woman | 1 |
| Leticia Dolera | Lady at the Séance (uncredited) | 1 |
| Amy De Bhrún | Prostitute | 1 |
| Hannah Tointon | Maud Gunneson | 1 |
| Adam William Cahill | Red Coat Soldier (uncredited) | 1 |
| Owen Roe | Colonel Brewster | 1 |
| Mary Stockley | Caroline | 1 |
| Mary Murray | Woman #1 | 1 |
| Morgan C. Jones | Broker | 1 |
| Charlotte Beckett | Beautiful Witch | 1 |
| Rachael Dowling | Dress Shop Owner | 1 |
| Bobby Aherne | Theatre Heckler / Rat-baiting Referee | 1 |