When Elaine (Julia Louis-Dreyfus) calls Hop Sing's, her name appears on a list posted on the wall of other people who have also been blacklisted. The other names include the names of some of the crew members.
There is a deleted scene where Kramer (Michael Richards) takes George (Jason Alexander) down to the Cuban embassy. It was cut due to time constraints.
Jerry (Jerry Seinfeld) wears red and blue clothes throughout the episode to represent Superman's colors
The wink towards the camera is a reference to the older Superman television series.