In "Seinfeld's" finale, the characters all end up in jail for breaking a Good Samaritan law, which means they didn't help someone in need. The people they didn't help end up testifying against them in court and they are all found guilty.
During their time in jail, the characters reflect on past actions as they wait for their sentencing. They eventually get released but are forced to spend a year in jail for their actions.
The finale was controversial because many fans felt like it wasn't a satisfying ending for the characters. However, the show's creators felt like it was a fitting conclusion to the series, as it tied together many of the themes from previous episodes.