Groucho Marx was 69 years old when he was a guest panelist on this show. The show had three parts. The first two parts involve guests that the panel can see but who are unknown to the public - the first (who has an eerie resemblance to then premier of Russia Nikita Kruschev) is a prison warden. The second is a female wrestler. The panel then has to ask questions that narrow down the guest's profession and determine what that profession is.
The third portion is done with the panel blindfolded and involves a famous guest, readily identified by sight, in this case Claudette Colbert. Questions are asked to determine the name of this famous person.
Groucho disrupts the proceedings at every juncture - "Can the product you manufacture be found in the kitchen?" The female wrestler's profession is never figured out by the panel, but the questions do lead the panel to a funny and interesting place. There are several opportunities at very raunchy humor, but the entire cast stays away from them because the code for TV broadcasting was quite strict in those days.