Columbo creator and Peter Falk argued over whether Mrs. Columbo actually exists

Episode review: Rest in Peace, Mrs Columbo – THE COLUMBOPHILE BLOG

Reviews: A Matter of Honor - IMDb

Who played Lieutenant Columbo before Peter Falk? - Quora

The 25 best episodes of 'Columbo', ranked

Did Detective Columbo have a wife? - Quora

Peter Falk Versus Columbo

Just One More Thing — Facts About Peter Falk And Columbo

A sweet, simple, salt-of-the-earth scruffball: why I love Columbo, Television

Reviews: Sex and the Married Detective - IMDb

Mrs Columbo Revealed!

Reviews: Mrs. Columbo - IMDb