S1, E20: When a crystal is magically stolen from the abandoned house, the Circle decides it was the traitor witch working with Eben (recurring guest star SAMMI ROTIBI) so Jake calls for a meeting with Isaac (recurring guest star JR BOURNE – The Exorcism of Emily Rose) to see if they can get him to change sides. Cassie's loose grasp on her dark magic threatens to destroy any possible alliance when their pursuit of the traitor leads them to the "Creepiest Place on Earth." Meanwhile, Faye and Jake work together to steal Dawn's crystal, Melissa and Adam pair up and uncover a new magic trick and a frustrated Diana reaches out to Charles for help.