S6·E1 Whose Wife is it Anyway?

After their night together, Helen tells Joe that it was all a big mistake and she goes to New York to marry Davis. While bemoaning his loss with Brian (who has sorrows of his own, when news comes that Alex has left the island for good), Joe comes to realize he has to win Helen back. He follows her to New York and finally catches up to her in the elevator on the way to Davis' penthouse.