When Jack Crawford's star pupil Miriam Lass is found alive, she becomes the FBI's best hope to identifying the Chesapeake Ripper, but her foggy memory complicates the search. Evidence found at the site of Miriam's rescue exonerates Will Graham of any involvement in the Ripper and Copycat cases, and he is released from the asylum. Will warns Dr. Chilton that he could be in danger due to his intimate knowledge of the Ripper case, but when Chilton tries to confide in Jack that he shares Will's fears about Hannibal, he is rebuffed; no evidence has been found against Hannibal, despite the FBI's efforts. Meanwhile, Jack wastes no time in reinstating Will on the BAU team as they hunt for the Ripper. After introducing Will and Miriam to compare notes, Jack's suspicions of Hannibal's involvement continue to build. Only Miriam's memory holds the key to unlocking the Ripper's true identity, but can it be trusted?