Caught this last-night. From the writer of CH4's Ultraviolet, Martin Shaw (playing his usual latter-day moody self) is the church's renegade chief exorcist - he even has his licence revoked. The opening episode was fairly uneven, lacking in convincing characters, and is fairly hard to distinguish from Sea of Souls, in facts it's probably another Da Vinci Code inspired series like Bonekickers (sorry if you'd erased that from your memory). I'll probably give it a couple more of outings before giving up.