When a cabin in the woods burns down, the bodies of two `witches' are revealed; Angela and Hodgins are arrested.
Old wounds are reopened when the retired lead detective on Beckett's mother's homicide case contacts her with new information, but then is gunned down right in front of Beckett before he can tell her what he knows.
Jane and Maura investigate when a competitor dies during a mock trial.
The team investigates the 1989 case of a prom queen who may have been intentionally killed in a hit-and-run; Rush tries to ignore her father's requests to give her sister another chance.
Denny suggests a day at the spa to cure Alan of his sudden tendency to speak unintelligible gibberish, and Denise Bauer defends a polygamist whose wives believe their husband has done nothing wrong.