The host and producer of What's My Line Live on Stage have been promising that the mystery guest on July 15 would be someone special and they did not disappoint. The mystery guest was Columbo himself, Peter Falk. Comedian Frank DeCaro managed to guess him after asking "were you known on your series for a distinct item of clothing?"
In addition to Peter Falk, the wonderful cartoonist Sergio Aragones was the "perfromer" for the show.
