“Penny Dreadful” is bringing back Patti LuPone and adding other guest stars for its upcoming third season, Showtime announced in a press release.

LuPone, who guest-starred in Season 2 as the Cut-Wife, now will be a series regular in the new role of Dr. Seward, an American therapist who uses “an unconventional new approach” to treat Vanessa (Eva Green). There’s no word if the new character is somehow related to the Cut-Wife, but I have my suspicions she is.

Wes Studi has been added as a new series regular. Christian Camargo, Sam Barnett, Jessica Barden and Shazad Latif will guest star in the surprising spiritual fright fest. 

Latif, who starred in “The Second Best Exotic Marigold Hotel” and played the doomed tech wizard Tariq Masood in “MI-5,” will play Dr. Henry Jekyll. Robert Louis Stevenson’s troubled doctor—who famously becomes the psychopathic Mr. Hyde—is the latest literary character added to the series.

Camargo (“Dexter”) will guest as Dr. Alexander Sweet, a zoologist who befriends Vanessa Ives. “Jupiter Ascending” actor Barnett plays Dr. Seward’s “mysterious young secretary,” according to the Showtime release.

Green isn’t the only show star to get new scene partners. Veteran actor Studi, who most recently played Chief Levi Gall on “The Red Road,” becomes a series regular in the role of Kaetenay. The Native American character shares a deep connection to Ethan Chandler (Josh Hartnett) and becomes an ally to Sir Malcolm (Timothy Dalton).

Jessica Barden (“Far from the Madding Crowd”) plays Justine, who becomes an assistant to Lily (Billie Piper) and Dorian Gray (Reeve Carney).

The nine-episode third season, which has begun production in Dublin, Ireland, won’t air on Showtime until 2016.

The show was created, executive produced and written by John Logan and also stars Harry Treadaway as Dr. Frankenstein and Rory Kinnear as the Creature.

Penny Dreadful

Wes Studi, shown here in SundanceTV’s “The Red Road,” will join the cast of Showtime’s “Penny Dreadful” in Season 3. (Quantrell D. Colbert/SundanceTV)