While at the crime scene, a carnation falls from Benedict's lapel. He later picks it up in front of Columbo, but the Lieutenant notices it was missing during the earlier televised concert.

It was directed by Nicholas Colasanto , better known to later audiences as "Coach" from Cheers .

Columbo uses news and concert footage to prove Benedict was not wearing the flower during the performance, but had it immediately afterward at the crime scene. Benedict's wife, Janice (Blythe Danner), ultimately refuses to lie for him, sealing his fate. Key Episode Trivia

This episode marks the first appearance of Columbo’s lethargic Basset Hound , whom he eventually names "Dog".

Originally written for a 90-minute slot, the network forced it to be expanded to two hours (with commercials), leading to some "padded" scenes, such as Columbo visiting Benedict's home to discuss taxes. Critical Reception "Columbo" Étude in Black (TV Episode 1972) - IMDb

Blythe Danner was visibly pregnant during filming; her daughter, Gwyneth Paltrow, was born just 10 days after the episode aired.

In addition to Cassavetes and Danner, the episode features Hollywood legend Myrna Loy as Benedict's mother-in-law.