Trivia: When Kramer is hosting the show and starts getting a little nervous about Jerry's "questionable material" he tells Newman to put on a tape and it starts playing some music while he talks to Jerry. The music that he puts on is the same music they used in the episode "The Pilot (2)" for the "Jerry" pilot.
Trivia: In the Seinfeld Finale, Jerry and George have a conversation in the jail cell about the positioning of a button on George's shirt. For those viewers who don't know or don't remember, that is why George asks, 'Haven't we had this conversation before?', because this is the same conversation that started off the series in the very first episode.
Trivia: The idea of George returning to work and pretending he didn't really quit was based on a real-life incident. Before co-creating "Seinfeld", Larry David once yelled at a "Saturday Night Live" producer and stormed off the set (he was a sketch writer), only to return the following Monday and act as if it never happened. He actually got away with it.