During its run on NBC from 1989 to 1998, Seinfeld told the stories of Jerry, Elaine, George, Kramer, and others through true-to-life experiences in New York City. As "a show about nothing," the comedy was a smashing success with viewers, esteemed as one of the best sitcoms in the history of television.
However, Seinfeld definitely had something going on when the cameras were off — and sometimes even when the cameras were on. Seinfeld fan theories abound when it comes to things like on-screen relationships, but the relationships off-screen could be just as tumultuous and dramatic at times. The entire cast of Seinfeld didn't always get along, sometimes to the point of writing characters off the show so that others wouldn't have to deal with them. There were also the fair share of cat fights, tears, lawsuits, temper tantrums, and other things that tend to plague popular television shows, including a long-running feud with Roseanne, proving every successful show has its dark secrets — even the comedies — and Seinfeld is no exception.