When the password is "HARP" Desi Jr.'s clue is "MARX", evoking Harpo Marx, who made a guest appearance playing his namesake instrument on an episode of "I Love Lucy."
In the lightning round, the password is "THUNDER" and Gary's clue is "LIGHTNING" to which Desi Jr. says "ROUND." Ludden stops the clock, momentarily confused if Desi is just repeating the name of the game.