Jason Alexander, who plays George Constanza in the series, revealed that his publicist asked if he would leak secrets about the series finale to paying fans.
Behind M*A*S*H, Cheers and The Fugitive, the controversial ending of Seinfeld ranks as one of the most-viewed series finale ever.
The two-part Seinfeld finale aired on 14 May 1999, drawing in 76.3 million viewers.
In the Nineties, fans wanted to know how Seinfeld ended so desperately that some resorted to bribery.