Plot: A burned-out Sam takes somber note of a psychic-turned-author (guest star Leland Crooke) whose cooperation with police in solving serial murders has taken a heavy toll on his emotional stability -- and worst of all, he's targeted by a serial slayer (guest star Dayna Gladstone) intent on putting him out of his misery. Back at the command center, John chafes under Bailey's strict policy and hard-nosed code of secrecy