First appearance of Kramer's (Michael Richards) friend and recurring character Mickey (Danny Woodburn).
The scene where Phil Totola takes "it" out after his date with Elaine is based on something that staff writer Carol Leifer experienced once when she was on a date.
Michael Richards wore a back brace and padding for the scene where Mickey assaults Kramer, so he could take the fall without injury.
Mark Tymchyshyn plays Phil Totola in this episode. Bob Odenkirk auditioned unsuccessfully for that part but did end up playing Elaine's medical intern boyfriend in the eighth season episode, The Abstinence (1996).
Jerry's (Jerry Seinfeld) superhero routine in the hospital was initially conceived for episode 1.0, Good News, Bad News (1989).