A cheating wife convinces her lover, who's a forensic scientist, to kill her husband's business rival and frame her rich husband for the murder. Lt. Columbo investigates.

A millionaire's being threatened with a lawsuit by a man he did business with. When he gets into a fight with the man, his trophy wife is more embarrassed than concerned about her husband. Now she can't divorce her husband because of a pre-nuptial agreement. And if she kills him, she would be the prime suspect. So she along with her lover decides to kill the man who is suing her husband and frame her husband. Which they do. When Columbo investigates the murder, one of the forensic people helping him is the woman's lover.—<[email protected]>

Patrick Kinsley and Cathleen Calvert are having an affair. She would very much like to leave her very rich husband Clifford Calvert but there is an iron clad prenuptial agreement that will leave her nothing if she divorces him. They briefly discuss killing him but then comes up with an idea: instead of killing him, while don't they kill someone else and frame him for the murder. She has a perfect candidate in Howard Seltzer, a dissatisfied business associate who is suing Clifford. They were even involved in a scuffle a few days ago, before many witnesses. Patrick Kinsey does the killing and thinks it can't go wrong - he's a forensic specialist for the LAPD and is assigned to the case. Lt. Colombo has a keen eye and a cigar butt combined with Kinsey's good manners is all he needs to realize who the killers are and set the bait to trap them.—garykmcd