The telecast that aired live on February 9, 1956, with Lucille Ball as a guest panelist, featured a 96-year-old contestant who was the last surviving witness to the assassination of Abraham Lincoln. Garry Moore introduced this senior citizen, Samuel Seymour, by saying he hailed from Maryland. When Seymour died two months later on the anniversary of the assassination, newspapers said he was a longtime resident of Arlington, Virginia. Whatever the truth of his residence, his secret was uncovered by Jayne Meadows. After she uncovered it, Moore explained to her, the other panelists and viewers that when John Wilkes Booth jumped down from the presidential box at Fords Theatre immediately after shooting Lincoln, five-year-old Seymour witnessed only that jump without knowing that any shots had been fired. The audience's laughter in reaction to the play muffled the sound of the gunshots for many people. The child felt sorry for the man who obviously had injured himself jumping from the presidential box to the stage. Booth indeed injured his leg and sought medical treatment before his capture.
Harpo Marx was one of the celebrity contestants on the show. The secret was that it was actually Chico Marx in Harpo's costume, since the brothers bore an uncanny resemblance to each other. None of the panelists guessed it.
On a show from 1962, contestants included Mr. and Mrs. Armstrong. Their secret was that their son Neil Armstrong was named that day to the US astronaut corps. During the interview after Betsy Palmer guessed the secret, Garry Moore asked Mrs. Armstrong how she would feel if her son became the first man to walk on the moon.
Regular panelist Betsy Palmer served as a temporary hostess on more than one occasion while Garry Moore was on vacation.
The show's longtime sponsor, Winston cigarettes, canceled a scheduled appearance on the panel by Groucho Marx because he insisted on smoking his cigar. A similar appearance by Ernie Kovacs in July 1956 was canceled for the same reason, but the sponsor had a last-minute change of heart and allowed him to appear--complete with cigar.