The gang are playing Pictionary in teams, with the boys versus the girls. Sheldon claims any team he's not on has a decided disadvantage, but the girls are confident they can win. During the game, Leonard struggles to identify Penny's drawing of a nail, while Sheldon accuses Penny of spoonfeeding the answer to him.
The teams struggle to identify the drawing of a quark-gluon plasma and an observational rebuttal of the Lambda-CDM model of the universe, but quickly identify a chocolate chip cookie.
Howard then tries to draw a sausage, but Raj and Bernadette cannot guess the answer. Sheldon then goes on to explain the Polish origins of several words, including the Polish astronomer Copernicus, who developed the model of the solar system, the naturalized French citizen Madame Curie, and radium.