SEASON 4, EPISODE 418 - Melinda discovers an intruder in the basement of her shop, but before she can find out much about him he runs out through the tunnels. She then has another encounter with Dr. Byrd (ep. 417), who tells her that he led the intruder, Ben, to her because he and Sam share the same condition. He then explains that Ben, much like Sam, had not been able to reconcile his past life with his new life and that it was slowly driving him insane. He tells Melinda that if she can help Ben resolve his issues, she will be able to help Sam with his.