Nightkill

Jaclyn Smith plays Katherine Atwell, a wealthy Arizona housewife caught-up in a web of intrigue and murder after her lover poisons her husband to death, who then becomes the unwitting victim of deception when she tries to escape the consequences. After Steve Fulton's (James Franciscus) betrayal, Kathy Atwell is driven by desperation as she navigates a complex trail of clues and suspects, including Robert Mitchum's minor yet pivotal role as Donner/Rodriguez, her husband's business partner with an ulterior motive.