My wife and I recently rewatched the series to introduce it to our 13-YO son. We would watch an episode with a familiar story line. Then, as it went on, we'd see two more familiar story lines. We would look at each other and go "are all three of those in the same episode???"
It was amazing how many times this happened. We tend to fondly remember these different story lines from Seinfeld as if they were individual episodes, but many times several were part of a single show. The Festivus episode is also the one where Kramer works at H&H Bagels, Elaine tries to avoid "Denim Vest" guy and Jerry dates the Two-Face girl. The Marbled Rye episode is also the one where Kramer buys too much at a CostCo-like store and feeds Beef-A-Rino to a horse, Elaine dates the saxophone player who won't practice oral sex, and George's parents dine with Susan's parents (which leads to the famous "rooster, chicken, hen speech"). I could go on all day.
