While Internal Affairs officer Rachel Jacobs investigates reports of a rogue cop, Jim risks revealing himself as the prime suspect when the police station is overrun by a group of thugs, and he is the only hope of survival. Meanwhile, while trying to nurse an ailing Joshua back to health at the lab, Katie and Stephanie run into Human Resources VP Victoria Morrow and begin to suspect that she isn't who she says she is.

Dr. King orders Victoria to use her abilities to slip into the Powell home and kill one member of the family. Meanwhile, JJ and Daphne investigate the death of Natalie's mother.