Paul Grinstead is a resident of Binghamton, New York.
During the events of The Twilight Zone: Season 1 Episode 21 Mirror Image played by Vera Miles
During a thunderstorm in November, Paul walks up to Millicent Barnes and hands her the purse she dropped and sits down next to her. He tells her that he was supposed to be in Syracuse, but the planes were grounded due to the weather and took a taxi, that then crashed.
He notices she looks troubled and she tells him about seeing things and they introduce themselves to each other. She tells him that everyone keeps on telling her that she has talked to them, when she hasn't. She continues that she saw herself sitting where she had been sitting and she isn't crazy. He thinks maybe someone is playing a joke on her. The bus arrives and as Millicent is about to get on the bus, she runs away and faints. The Bus Driver asks Paul if he and Millicent are coming, and he tells him that they will catch the next one. The Ticket Agent turns off some of the lights and the Washroom Attendant tells Paul she is leaving and tells Paul, she thinks Millicent needs mental help.
Millicent wakes up and Paul tells her the bus left, but another one is coming. She tells him of something she once read about different planes of existence and that everyone has a counterpart in the other world and sometimes the counterpart gets stuck in their world and to survive, has to replace them. He tells her that he has a friend in Tully that might lend them his car. He goes to use the phone and the Ticket Agent tells him that he thinks Millicent is crazy. Paul calls the police and then invites Millicent to go outside with him and as they do, the police arrive and take Millicent away. Paul goes to get some water and when he looks, his luggage is missing. He looks up and sees his double running outside. He chases after it, but it gets away.