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The mistress of a conductor becomes a target for murder after threatening to tell all to her lover's wife.
Heart surgeon Barry Mayfield turns his talents turn to murder and plans to kill his mentor, who refuses to release their research findings prematurely. When the mentor has a heart attack, Mayfield plots the perfect murder, but must kill two people to cover his tracks while he waits for his plan to succeed.moreless
When a chess grandmaster realizes that he is unable to defeat his rival at a tournament, he resorts to murder and makes it look like suicide. But Columbo isn't fooled... and the victim isn't quite dead.