George Costanza's (Jason Alexander) middle name is Louis, which is mentioned in this episode. It's a tribute to Lou Costello, half of the famous comedy team, Bud Abbott & Lou Costello, whose 1950s TV show was a major influence on the writing of Seinfeld.
George's breakup line "It's not you, it's me" makes its first appearance in this episode. It later becomes the subject of much discussion in The Lip Reader (1993).
Bob Sacamano is a fictional friend of Kramer (Michael Richards). He is never seen but is the source of many bizarre anecdotes. Larry Charles has stated that Sacamano was a real-life friend, although the two fell out shortly after the character was first introduced. Throughout the course of the series, he was referenced in the following episodes:
Seinfeld writer, Elaine Pope, became the first female writer on the show to have a script turned into a proper episode with this episode. Pope previously worked with Larry Charles, Larry David and Michael Richards on Fridays (1980).