Season three, which premieres Sunday, May 1, embraces the dark side with the addition of Shazad Latif as Robert Louis Stevenson’s Dr. Henry Jekyll.
Patti LuPone (American Horror Story), who guest-starred last season as the Cut-Wife, returns as a series regular in the new role of Dr. Seward, an American therapist who treats Vanessa (Eva Green) with an unconventional new approach.
Wes Studi (Hell On Wheels) joins as a series regular as Kaetenay, an intense, enigmatic Native American with a deep connection to Ethan (Hartnett) who also becomes an ally to Sir Malcolm (Dalton).
Also starring Josh Hartnett and Timothy Dalton, Penny Dreadful is written and executive produced by three-time Oscar nominee John Logan (Hugo, The Aviator, Gladiator).
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Other guest stars include Screen Actors Guild Award nominee Christian Camargo (Dexter, The Hurt Locker) as Dr. Alexander Sweet, a zoologist who strikes up an unlikely friendship with Vanessa; Sam Barnett (2012, Jupiter Ascending) as Dr. Seward’s mysterious young secretary; and Jessica Barden (The Outcast, Far from the Madding Crowd) as Justine, a young acolyte to Lily (Billie Piper) and Dorian Gray (Reeve Carney).
Perdita Weeks (The Tudors), plays Catriona Hartdegan, a scholar with expert knowledge of the supernatural. Simon Russell Beale returns as Dr. Ferdinand Lyle and Sarah Greene as Hecate. Rory Kinnear (as The Creature) and Harry Treadaway (as Dr. Frankenstein) also star.
Penny Dreadful is created, written and executive produced by John Logan for Desert Wolf Productions, along with Oscar winner Sam Mendes (American Beauty, Skyfall) and Pippa Harris (Revolutionary Road, Call The Midwife), both of Neal Street Productions and Karen Richards (The Borgias). Penny Dreadful is a co-production with Showtime and Sky.
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