CBI receives a call to investigate a body found at a state cemetery. The coroner discovers that the body had been frozen and posed in the position it was found prior to being placed in the morgue, but no identification has been made. The team arrives back at headquarters to discover Bosco shot and critically wounded while two members of his unit are dead. Agent Hicks is unaccounted for. CBI is locked down as Lisbon and Jane try to stabilize Bosco before the paramedics arrive. The security tapes are reviewed and building personnel are interviewed. Jane inquires about the identity of the body that was found at the cemetery. Forensics identifies the body as Dr. Towlen Morning from Stockton. Jane is immediately out the door to Dr. Morning's office in Stockton with Lisbon and Cho in tow. There he finds a Red John smiley face painted on Morning's office wall along with Agent Hick's dead body. Dr. Towlen Morning was the family doctor of Janet and Carter Peak, Red John's third and fourth victims, but Carter's body was never found. Jane believes that Red John made a mistake in the murder of Carter Peak and killed Dr. Morning and Bosco's team to stop them from discovering his mistake. Jane and Cho head out to Cloverville to investigate Carter Peak's body that was discovered in the foundation of a strip mall that was recently torn down. At the coroner's office, they find out that an Agent Rojo, matching Bosco's assistant Rebecca's description, already signed out the body along with all the samples for lab testing. Meanwhile, Rebecca attempts to finish Bosco off while he lies in his hospital bed but is foiled and she's arrested. Bosco's injuries prove too much for him and he passes away. Jane questions Rebecca. Rebecca reveals that Red John had her kill Bosco and his team because he missed Jane and wanted him back on the case. In the process of being moved to another location, Red John, dressed as a guard, poisons and kills Rebecca. Minelli is unable to handle the trauma of recent events and resigns as department head of the CBI.