Reeve Carney as Dorian Gray, a charismatic man who is ageless and immortal.
Timothy Dalton as Sir Malcolm Murray, a hardened explorer of the African continent, on a deeply personal quest to save the remaining members of his family.
Eva Green as Vanessa Ives, an enigmatic, quietly driven heroine who proves herself a force to be reckoned with as she battles powerful, relentless forces from the underworld.
Rory Kinnear as the Creature, a creation Frankenstein abruptly abandoned, who, not given a name, variously uses the aliases Caliban and John Clare.
Billie Piper as Brona Croft / Lily Frankenstein, an Irish immigrant seeking to escape her brutal, violent past.
Danny Sapani as Sembene, a mysterious long-time ally of Sir Malcolm (seasons 1–2).
Harry Treadaway as Dr. Victor Frankenstein, an arrogant, reclusive young doctor whose ambition and research involve transcending the barrier between life and death.
Josh Hartnett as Ethan Chandler (born Ethan Lawrence Talbot), a charming, brash and daring American man of action with uncanny marksmanship, who detests violence, and is more complicated than he likes to admit.
Helen McCrory as Evelyn Poole, a professional spiritualist known by the alias Madame Kali who is secretly the leader of a powerful coven of witches called “Nightcomers” (season 2, recurring season 1).
Simon Russell Beale as Ferdinand Lyle, an eccentric Egyptologist (season 2, recurring seasons 1 and 3).
Patti LuPone as Dr. Florence Seward, an alienist or early psychotherapist treating Vanessa’s depression (season 3; LuPone previously guest-starred as Joan Clayton in season 2)
Wes Studi as Kaetenay, an Apache with a connection to Ethan, who becomes an ally to Sir Malcolm (season 3).
Penny Dreadful is a British-American horror drama television series created for Showtime and Sky by John Logan, who also acts as executive producer alongside Sam Mendes. The show was originally pitched to several US and UK channels, and eventually landed with Showtime, with Sky Atlantic as co-producer. It premiered at the South by Southwest film festival on March 9 and began airing on television on April 28, 2014, on Showtime on Demand. The series premiered on Showtime on May 11, 2014, the first in an eight-episode season. After the third-season finale on June 19, 2016, series creator John Logan announced that Penny Dreadful had ended as the main story had reached its conclusion.
The title refers to the penny dreadfuls, a type of 19th-century British fiction publication with lurid and sensational subject matter. The series draws upon many public domain characters from 19th-century British and Irish Gothic fiction, including Dorian Gray from Oscar Wilde’s The Picture of Dorian Gray; Mina Harker, Abraham Van Helsing, Dr. Seward, Renfield, and Count Dracula from Bram Stoker’s Dracula; Victor Frankenstein and his monster from Mary Shelley’s Frankenstein; and Dr. Henry Jekyll from Robert Louis Stevenson’s Strange Case of Dr Jekyll and Mr Hyde.