The series follows the ventures of a Missing Persons Unit of the FBI in New York City.

A politician's campaign manager (Speakman) discovers that the candidate (Shatner) is a front for a military organization plotting a political overthrow of the government. In trying to expose the candidate's right-wing activities, he puts himself and his family in danger of being killed.

Susan wants her reprehensible ex-husband dead and, in several bungled attempts by henchmen, tries to accomplish the deed.

An ex-FBI agent gradually uncovers the nature of a conspiracy behind the death of a black presidential candidate

When other Scanners in the Los Angeles area are left drained of life, Sam is forced back into action in a desperate attempt to stop Volkin, who is determined to become the most powerful - and ruthless - of his kind.