BBC America's new drama "Intruders" premieres at 9 p.m. CT Aug. 23.

Now that BBC America has packed away the clones of "Orphan Black" until next year, the network is gearing up for its next big Supernatural Saturday debut: "Intruders."

The network dropped the first trailer over the weekend for the thriller, which debuts at 9 p.m. Aug. 23. The minute-long clip presents the show's big-name cast members, including "Life on Mars" and "Doctor Who" alum John Simm and Oscar winner Mira Sorvino as Jack and Amy Whelan.

"In the beginning there was death," Amy says to her hubby, a former LAPD officer. He doesn't think she's been herself lately—which is likely dead on considering the premise of the series.

Based on Michael Marshall Smith's 2007 novel "The Intruders," it tells the story of a secret society trying to become immortals by slipping into the bodies of others. (Apparently there are no vampires in this show’s universe.)

The cast also includes James Frain as gun-toting killer Richard Shepherd, Tory Kittles as Gary Fischer and Millie Brown as a creepy kid named Madison who warns, "What goes around, comes around." And yes, that's Robert Forster as Frank Shepherd, who tells someone, "We're just here to shepherd you." (Hmm, is there a name joke there?)

Glen Morgan, who worked on "The X-Files" back in the day, serves as writer and executive producer for the eight-episode series from BBC Worldwide Productions. Jane Tranter ("Da Vinci's Demons," "Rome"), Julie Gardner (“Doctor Who,” “Torchwood”) and Rose Lam (“The L Word”) also serve as exec producers.

Also involved are directors Eduardo Sanchez (“Blair Witch Project”) and Daniel Stamm (“13 Sins,” “The Last Exorcism”) and production designer Mark Freeborn (“Breaking Bad”).

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