2. Bad Code

Complete story — includes the ending

Root interrogates Denton Weeks for the Machine's location and kills him after he discloses it. Reese identifies the missing girl provided to him by the Machine as Hanna Frey, who was abducted and never found twenty years prior. Reese suspects the missing Hanna to be Root, especially as her abductor was set up to be murdered in a manner matching Root's MO. Reese and Carter's investigation leads them to Hanna's friend Samantha Groves, the sole witness to the abduction. Sam informed the local librarian of what she saw, only for the librarian -- the perpetrator's wife -- to accuse Sam of lying and intimidate her into silence about the abductor's identity. Sam later adopted the alias "Root" and left home after the death of her mother. With the help of the remorseful librarian, Carter finds Hanna's body and ensures that she gets a proper burial. While investigating Corwin's murder, Fusco finds a taped conversation regarding the government's search for Weeks, which, combined with a clue found in Hanna's killer's house, allows Reese to locate the cabin and retrieve Finch. Root escapes but calls Reese to thank him for finding her friend, but warns that she will come back for Finch.