Publiush or Perish was a great episode but the other two you mentioned were very good as well. There is a website for peter falk, you may wish to check out. It is:

www.peterfalk.com

There were a lot of similarities between Murder by the Book and Publish or Perish. I liked when he said to Columbo in "Murder by the Book," 'Now if you'll excuse me Lieutenant....." In a very hostile tone. I also liked his portrayal of the drunk in the restaurant in Publish or Perish. But to me, my most favorite Cassidy episode was "Now You See Him."

"Now if you'll excuse me Lieutenant....."

Interesting you should single that line out Steve, because if you listen to it intently, you can tell it was a voice-over added to the scene later on.

It's not an unusual practice though, and in common use -- just like Dr. Keppel's "outlawed" idea.

i really don't think i could decide which episode i like him better in. every time i finish watching one of these i always say that i liked him best in that episode....but then i'll watch another one and i think he is the best in that one......i've decided to decide not to decide!