 Elaine lets a potential employer borrow Mr. Pitt s tennis racket, but the injury suffered may ruin her chances, especially when she must get his racket back. Jerry s girlfriend never laughs but he meets her roommate who does, so Jerry decides he would like to make "the switch." George s model girlfriend may be bulimic. He needs proof so he meets Kramer s mother, who s a bathroom matron. While there he finds out Kramer s first name, Cosmo. Kramer decides it is time to be himself and begins to use his first name. George has the perfect plan for "the switch," a menage a trois.