Stephanie is picked up in a bar by Howard, but when his plan to let her drive the Mars rover fails, she leaves the Mars Rover lab with Leonard and the two immediately show an attraction to each other. Howard becomes angry when he finds out, but he soon changes his mind when Stephanie sets Howard up with one of her friends. Sheldon begins meddling in Stephanie and Leonard's new relationship in an effort to strengthen it since in his eyes, Stephanie is the only "tolerable" mate Leonard has had. After several weeks of dating, Stephanie officially begins living with Leonard and Sheldon in his apartment (although Leonard does not realize this until Sheldon and Penny point it out to him). Stephanie uses sex to manipulate Leonard when he tries to slow down the relationship. After much hesitation, Leonard texts her at the university and tells her to move out because he is uncomfortable with the pace of the relationship, although he apparently leaves to have sex with her. They are not seen breaking up on camera and she is neither seen nor mentioned again.