Columbo - Season 2 - Eps 4: Dagger of the Mind
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.
About Columbo

Title: Columbo
First Air Date: 1971-09-15
Last Air Date: 2003-01-30
Status: Ended
Rating: 8.073/10 (from 722 votes)
Language: EN
Seasons: 11
Total Episodes: 67
Network: ABC NBC
Genres: Crime, Drama
Production Companies: Universal Television, Studios USA, Universal Television Entertainment, NBC Studios
Synopsis
Columbo is a friendly, verbose, disheveled-looking police detective who is consistently underestimated by his suspects. Despite his unprepossessing appearance and apparent absentmindedness, he shrewdly solves all of his cases and secures all evidence needed for indictment. His formidable eye for detail and meticulously dedicated approach often become clear to the killer only late in the storyline.
Cast

Peter Falk
Columbo