Dear G$8605, You do realize the people at Buzzr will not see this unless you write to them at their own site

His name was a BIG clue

Since it was syndicated, it didn't really have an exact airdate. It would air on different dates around the country, or in some places, not at all.

@@Bigbadwhitecracker is correct. But using the Sherlock Holmes method reason by deduction, we can easily tell it's between the fall of 72 and spring of 73. 1) Larry Blyden took over for Wally Bruner in the fall of 72. 2) Larry's full name is on seat like Wally's was, it would later be just "Larry" like the panel. 3) Johnny Olsen announced this episode, he would later leave to do Goodson Todman shows in California such as The New Price Is Right and Match Game (Most of the remaining What's My Lines would be announced by Chet Gould). 4) The theme played when the panel and Larry (although we don't see it here thanks to Buzzr) were introduced. Eventually it would stop. 5) Larry's pull tab had the money amounts on them for no answers like the flip cards used to in Wally's and John Daly's day. They would eventually go from 9 to 0.