A psychiatrist uses a patient he is having an affair with to help him kill his wife, but his perfect alibi may come apart at the hands of a seemingly befuddled LAPD lieutenant.

Leslie Williams, a brilliant lawyer and pilot, murders her husband Paul to get his money, arranging the act to look as if he had been kidnapped and killed by his captors.

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.

The mistress of a conductor becomes a target for murder after threatening to tell all to her lover's wife.

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 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?

Columbo is asked to investigate the disappearance of Dian Hunter, director of a men's magazine. Naturally, the prime suspect is her lover and co-editor Sean Brantley, who spends lots of time with the young girls he works with.