Just watched this episode again for the 100th time...it's amongst my favorites. I think Nimoy is one of the most diabolical criminals in the history of the show. He's smart, cold, calculating, and utterly ruthless. I also got a huge surprise when Columbo get mad...it's SO infrequent that it really comes across as special. As I watch this episode of Columbo in 2020 and during this infernal pandemic, it give me comfort, and much like Jeremy Brett in the Granada Sherlock Holmes, Columbo is ageless and as fresh today as it was when it first arrived on our tv's so long ago.