Columbo's first mystery pits him against a cheating doctor out to get rid of his wife in favor of his young, pretty actress girlfriend.
A high-flying lady lawyer kills her husband for the insurance money, and tries to makes It look like a kidnapping gone wrong.
One member of a mystery-writing-team decides to kill his more talented partner when the better writer decides to go solo.
A private investigator kills his client's wife after she threatens to expose his blackmail scheme. The client then hires the detective to assist Columbo in the search for the killer.
A famous general kills a business associate, then woos a neurotic female witness to thwart Columbo's investigation.
An art critic, Dale Kingston, kills his uncle for his valuable collection of paintings. All the clues lead to the dead man's first wife. Can Columbo correct the Lieutenant's error before it is too late?
A woman shoots her overbearing brother, claiming she thought he was a burglar. Columbo doesn't buy the self-defense claim - he know's it's murder
A chemist rigs a bomb in his uncle's car to gain control of his uncle's company, then plants clues to make Columbo suspicious of the company's Vice-President.
An architect kills his business partner and deliberately lets Columbo suspect him, leading Columbo to think that he's hidden the body in the foundation of a building under construction. He plans to let Columbo dig up the site and find nothing, knowing that its the perfect place to hide the body since Columbo would never look in the same place twice.
The mistress of a conductor becomes a target for murder after threatening to tell all to her lover's wife.
Jarvis Goodland, along with his nephew, plan a kidnap scam to break the nephews trust fund, but after the money has been collected, Jarvis kills his partner.
The manager of a football team kills the team's owner, disguising himself as an ice cream vendor as a cover. He then uses a recording of a faked phone call as an alibi to prove he was elsewhere at the time of the murder.
While on a work trip to London, to learn the techniques of the British police, Columbo gets involved with the murder of Roger Haversham, a rich old businessman who is financing the careers of two rundown theater stars. When Sir Roger threatens to end their careers, because he felt betrayed, he's killed. A short while after, his butler figures out the motives for his master's murder, and blackmails the actors, who have no other choice than to kill him and make it look like he commited suicide due to remorse, because he murdered his employer. Columbo stills manages to catch both the murderers, with the help of a pearl and a new umbrella.
A fading movie star tries to murder a writer who is attempting to blackmail her, but accidentally kills her P.A.
Leonard Nimoy plays a heart surgeon whose talents turn to murder. Stung by jealousy, he's planning a surgical death for his brilliant but ailing associate. Will Geer plays the intended victim.
A chess grandmaster disposes of the champion, who keeps coming back on him.
A wealthy man is murdered; his twin nephews stand to inherit, but which one committed the crime?
