Thank you for your comments. I appreciate
DirQ, yes I think you are right about Dr. Flemming coming back home, he saw all the suspicious circumstances and he didn't even say a word.
About Tommy I was thinking that it was a set up made by Columbo but I wanted to hear another opinions.
Fred, thank you for your nice words, and yes, I remember you doing the same thing here, episode by episode, I always had a great pleasure to read it and enjoy :)