First of all I should say that I'm sure no-one here is in any doubt that Seinfeld had some of the best writing, with some of the most complex yet smoothly intersecting plotlines in sitcom history. That's a given. But I was watching The Diplomat's Club tonight and was - as before - struck by how a major chaaracter trait was so obviously tacked-on to help on a plot-line. In this case it was Kramer's gambling problem, mentioned at the start of this episode, and never before in more than 5 series - despite the fact that we've seen Kramer gambling at least twice before (The Subway, The Contest) without repercussions. It comes up later on, to provide drama when he's gambling big money with the Texan. And AFAIK it's never mentioned again.
Another clumsy plot-line turns up in The Kiss Hello, again George's previously unknown super-hearing is mentioned at the start of the ep, and comes into play later on. Again - does that ever turn up in another ep?
Any more?
-TF