Columbo

A health club owner murders one of his franchisees. Lt. Columbo is on the case. Milo Janus owns a chain of health clubs, but one of his franchisees discovers the man is cheating him - and can prove it to the authorities. Janus responds by murdering his partner and making it look as if he had accidentally killed himself trying to lift a barbell that was too heavy for him. Janus creates a would-be perfect alibi for himself involving a tape recording of his victim's voice, a phone that doesn't light up, a sexy secretary, a party for friends at his house, and a pornographic horror movie. But no alibi is perfect when the rumpled Lt. Columbo is on the case.

A photographer murders his wife and blames her death on a bungled kidnapping. But Lt. Columbo has an even sharper eye than the Pulitzer Prize winner.

The commandant of a military academy murders the chairman of the board, who wants to oust him. Lt. Columbo takes up residence in the barracks to expose the killer.

Lt. Columbo takes a trip to Acapulco, but finds himself on a new case when a used car dealer commits murder on the cruise ship.

A gadget-happy inventor murders his mother-in-law; Lt. Columbo is on the case.

A psychiatrist, who specializes in hypnosis, murders the husband of his mistress and convinces her to lie to the police; it's up to Lt. Columbo to discover the truth.