Deep in the mountains of Western Pennsylvania, John (Matt Ryan) is a small mining community’s only defense against an ancient Welsh spirit. In the course of protecting these isolated innocents, John finds a vital new ally in a mysterious young woman named Zed (Angélica Celaya).

Harold Perrineau and Charles Halford also star.

Episode 1.02 of Constantine  is titled “The Darkness Beneath” and airs Friday at 10/9c on NBC.

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All photos courtesy of Tina Rowden and NBC