Peppard stars as a cynical Washington, DC, police captain who is being honored for his capture of a psychotic rapist-murderer, Lyons, just as the courts are overturning the killer's conviction because Peppard failed to read him his rights. Peppard suspects that his wife, Seberg, is
having an affair; one night, when he is at a speaking engagement, she and her lover (Lewis) are found murdered in bed. Peppard becomes the prime suspect and enlists the services of Kiley, the civil rights lawyer who represented Lyons. With his prospects dim, Peppard breaks out of jail and goes in
search of the person he thinks killed his wife. PENDULUM is a relatively honest examination ...