Showtime has released a haunting newtrailerfor its hit drama seriesPenny Dreadful, ahead of the much-anticipated third season premiere on Sunday, May 1 at 10 PM ET/PT. StarringJosh Hartnett,Timothy DaltonandEva Green,Penny Dreadfulis a frightening psychological thriller created, written and executive produced by three-time Oscar nomineeJohn Logan(Hugo,The Aviator,Gladiator). This trailer features a new look atJosh Hartnett’s Ethan Chandler, who seems to be embracing his identity as a werewolf.

This season onPenny Dreadful, Tony Award-winning star 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 aseries regularplaying Kaetenay, an intense, enigmatic Native American with a deep connection to Ethan (Josh Hartnett) who also becomes an ally to Sir Malcolm (Timothy Dalton).

The third season, which premieres withThe Day Tennyson Diedon May 1, also adds Robert Louis Stevenson’s Dr. Henry Jekyll (Shazad Latif). Otherguest starsinclude Screen Actors Guild Award nomineeChristian 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; Jessica Barden (The Outcast,Far from the Madding Crowd) as Justine, a young acolyte to Lily (Billie Piper) and Dorian Gray (Reeve Carney); and Perdita Weeks (The Tudors), as 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) andHarry Treadaway(as Dr.Frankenstein) also star.

Penny Dreadfulis created, written and executive produced byJohn Loganfor Desert Wolf Productions, along with Oscar winnerSam Mendes(American Beauty,Skyfall) and Pippa Harris (Revolutionary Road, Call the Midwife), both of Neal Street Productions and Karen Richards (The Borgias).Penny Dreadfulis a co-production with Showtime and Sky. For more information aboutPenny Dreadful, go to:SHO.com, follow on Twitter, Instagram and Facebook, and join the conversation using #PennyDreadful.

With just a few weeks left untilPenny Dreadfulreturns on Showtime, stay tuned for more footage and photos form this highly-anticipated season. Do you have any theories about what will happen onPenny Dreadfulthis season after taking a look at the latest trailer? Chime in with your thoughts below, and stay tuned for more as we get closer to the May 1premiere date.