Learning that Dr. Bellows has told General Peterson that Tony should marry for his emotional stability as an astronaut, Jeannie prepares for the wedding. She produces Phoney, a twin of Tony's, who starts romancing her as an example for Tony. Getting nowhere, Jeannie makes Phoney disappear. Later, Dr. Bellows sees a romantic interlude between Jeannie and Phoney and leaves Tony's house, certain a wedding has been set for the following Sunday afternoon. Although Tony tries to get out of his predicament, he realizes he is stuck when the General congratulates him on his coming wedding. Later, Tony tells Jeannie he is going through with the affair. Jeannie produces Phoney to show Tony how to act at the wedding. Phoney tries to get Jeannie to marry him before she makes him vanish. At the chapel, Jeannie runs away at the last moment. At home, Tony tries unsuccessfully to make Jeannie believe it was actually Phoney who appeared at the wedding. Sure it was Tony, Jeannie tells she ran away after deciding never to force herself on him. When Tony musingly asks what would happen, had they gotten married, Jeannie insinuates he will never know.