A forensic psychologist experiences detailed flashbacks of crimes when she probes homicide scenes in this grim paranormal cop saga. Dr. Sam Waters' unsettling gift enables her to see the events from the perspective of victims and killers alike. Her most persistent foe was Jack, an enigmatic serial killer who murdered her husband. To pique viewers' curiosity, NBC initially withheld the identity of the actor playing Jack, but fans soon learned it was Dennis Christopher.