Ben Murphy stars as a special agent Sam Casey, who becomes capable of invisibility as a result of the after effects of an explosion during an underwater salvage operation. Co-starring in the film are Katherine Crawford as computer specialist Dr. Abigail Lawrence and Richard Dysart as Casey's boss, Leonard Driscoll. When friend and co-worker Abby Lawrence is able to perfect a means to control his invisibility. Casey, an agent and chief troubleshooter for the think tank facility known as Intersect, becomes a valuable secret weapon for the firm and is given the code name minus one. Convinced the explosion was the work of saboteurs, Casey, Abby and Driscoll,uncover a plot to execute wealthy Charles Royce, head of one of the country's largest industrial complexes who had hired Casey for the salvage job.
Special agent Sam Casey poses as a truck driver to safely transport a top-secret liquid cargo, unaware that it has been replaced by a highly volatile chemical.
Sam is pitted against a heat sensing, computerized robot controlled by a dangerous, embittered scientist who is using his creation to penetrate U.S. security systems and conduct high-level espionage.
A foreign agent poses as Sam Casey and penetrates Intersect's security to steal top secret files.
The sudden death of a top-level government scientist embroils his unsuspecting former secretary in a race against time between Sam Casey and foreign interests seeking top-secret data about her former employer's work.
Accused by his employers of slaying a fellow agent, Sam Casey goes underground in an attempt to clear his name.
Casey's attempt to help a noted female scientist defect from an Iron Curtain country is hampered by the woman's daughter, whose attachment to a double-crosser jeopardizes the trio's escape.
Leonard Driscoll summons Sam Casey to unmask Robert Denby who he suspects of sabotaging the U.S. defense system.
A crew turns insubordinate and takes captive a shipping magnate as their hostage.
A former boxing champion, in the heavyweight category, accepts to challenge the current title holder, under the apparent intention of the promoters to do a charity event. But when he is advised to take a fall, he refuses. Some minions have kidnapped his father and then have proceeded to blackmail him into accepting the match. Sam Casey steps in to help the former champion.
Sam is assigned to protect and help a deposed African leader known as The Lion return to his country in order to end the ongoing civil war. During the journey both men's personalities are drawn, and Casey imbues The Lion with ideas about the sociological reality of his people.
Pretending to be a rookie, Sam (Ben Murphy) teams with a veteran supposedly involved in an assassination plot.