- The show's main characters, including Donna Martin, David Silver, Kelly Taylor, and Brandon Walsh, all graduated from high school.
- Donna and David's relationship was tested when Donna was offered a job in New York City, but they ultimately decided to stay together.
- Kelly and Brandon faced difficulties in their relationship due to their different career paths, but they eventually reconciled and got married.
- Steve Sanders pursued a political career and won a seat on the city council.
- Andrea Zuckerman, who had left the show in earlier seasons, returned for a guest appearance in the series finale.
- In the final episode, the gang gathered at the Peach Pit Diner for one last time, reflecting on their time together and saying their goodbyes. The show ended with a montage of clips from the series and a voiceover from Brandon, who said, "And so, the gang from West Beverly High said goodbye to the halls of their high school, and to each other. They went on to make their mark on the world, and to live their lives to the fullest. Goodbye, 90210."