In the Sex and the City season five episode " The Big Journey ," Carrie and Samantha take a train to San Francisco where Carrie reunites with Mr. Big, while Charlotte starts a passionate, unexpected relationship with her lawyer, Harry. The episode explores themes of personal growth and whether a change in location can truly alter one's romantic patterns. You can find full episode recaps on IMDb and Television of Yore . Sex and the City - Season 5, Episode 7 - Television of Yore