Sheldon asks from Amy to marry him, and she accepts after they were interrupted by a phone call from Leonard and Penny, where Sheldon reveals to them that he chose Amy because Dr. Nowitzki kissed him, but he realized that the only person he wants to kiss is Amy. Bernadette finds out that she is pregnant, something she and Howard at first they have a difficulty to accept, but later they ask from Leonard and Penny to have a baby too, to go through together, but they refuse. At a dinner with some colleagues of Amy’s, Sheldon is disappointed that they are more impressed with Amy's work than his own, but later he understands his mistake. Three months later, Amy hugs Dr. Nowitzki and thanks her.
