The über-analytical Dr. Brennan has never been shy about her doubts when it comes to theology, but if she is ever going to get religion, this is the night. The series' winter finale finds the team investigating the charred remains of what appears to be a demon — complete with horns and a tail — found on the altar of a Catholic church. The case spooks the God-fearing Booth, but he and Brennan are going to have to tip over some sacred cows to get to the bottom of this mystery. Joshua Malina guest stars.
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