When the police arrest Newman for his part in the dognapping, he says, "What took you so long?" The same thing David Berkowitz (Son of Sam) said when he was ultimately arrested. In an earlier episode ("The Diplomat's Club" 6.21), Newman reveals he used to double-date with Berkowitz, and took over his mail route when he was arrested.
Goof: Jerry and George are supposed to go see Firestorm at night, but when the outside of the theatre is shown it's clearly daytime.
When Elaine finally decides to call Newman to "handle" the dog, she just picks up the phone and dials. Why would she know Newman's number by heart?
Watch closely. When Elaine first enters Jerry's apartment complaining about the dog, a production mic is seen above Elaine for a couple of seconds. It is hard to notice, as only the top of it is there, but it is there.
They mention that they dropped the dog off almost in Monticello, which is 95 miles by road from 129 W. 81st Street. At 5 mph (which is generous for a dog of that size, not to mention whether a dog has the endurance to travel so far), the trip would have taken 19 hours - clearly not allowing the dog to make it back the same night.
When exactly did George's parents get back together? In "The Understudy" Frank almost got back with a Korean woman, which means he and Estelle didn't get back together at that point. Is it possible they did during the summer? There's no specific explanation.
Firestorm was meant to be a fake movie. The real movie "Firestorm" with Howie Long didn't come out until 1998, three years after this episode aired. None of the movies discussed in Seinfeld are real movies. It's just a coincidence that a real Firestorm was made. [ Editor's note: Several real movies have been referred to, or seen by the gang; examples include "The English Patient", "Schindler's List" and "Plan 9 From Outer Space." ]
At one point, George is standing on a pier, watching other couples, and thinking about marriage. He's actually standing on the Santa Monica Pier.
(about George asking Susan to marry him)
Jerry: And she said yes?
George: Well, it took a couple hours of convincing, but I was persistent.
Estelle: Georgie's getting married!!
Frank: Get the hell outta here. He's getting married?
Frank: To a woman?
George: I'm much more comfortable criticizing people behind their backs.
George: You know, it was really very wrong of you to back out on that deal.
Jerry: I didn't make a deal, I just shook your hand.
George: Yeah, well that's a deal where I come from.
Jerry: We come from the same place.
Elaine: There is this dog in the courtyard across from my bedroom window that never, ever stops barking. I lost my voice just screaming at this thing. I can't sleep. I can't work. I mean, I just moved. I can't move again. What am I gonna do? What? What am I gonna do?
Kramer: Well, there is something you can do.
Elaine: What? Kramer, I'll do anything.
Kramer: Well, what if there should be an unfortunate accident?
Jerry: You're gonna rub out the dog?
Jerry: What is this? What are we doing? What in God's name are we doing?
Jerry: Our lives. What kind of lives are these? We're like children. We're not men.
George: No, we're not. We're not men.
(George is playing chess with his girlfriend, Alice.)
George: Well, you got no place to go. I'll tell you what your problem is. You brought your queen out too fast. What do you think? She's one of these feminists looking to get out of the house? No, the queen is old fashioned. Likes to stay at home. Cook. Take care of her man. Make sure he feels good.
George: I don't think we should see each other anymore.
Newman: (singing) How much is that doggy in the window?
Elaine: Will you two shut up?!
Kramer: Is that a new song?
Kramer: You started wondering, "Isn't there something more to life?"
Kramer: Well, let me fill you in on something: there isn't.
Jerry: There isn't?
Kramer: What were you thinking, Jerry? Marriage? Family?
Jerry: Well . . .
Kramer: They're prisons! Man made prisons! You're doing time! You wake up in the morning: she's there. You go to bed at night: she's there. It's like you have to ask permission to use the bathroom.
(talking to Estelle on the phone)
Susan: I just want you to know that I love your son very much.
Estelle: Really? You do? May I ask why!?
Newman: What took ya so long?
Julia Louis-Dreyfus accidentally shouted herself hoarse while filming the scene where Elaine yells at the dog. Rather than postpone filming or have Julia redub her lines later, the staff decided to write her laryngitis into the script, which is why Elaine speaks hoarsely throughout the entire episode.
So far, the credits format has been showing the regular actors and the main producers during Jerry's opening stand-up, and, the creators, script writers and directors during the second scene. But, as from this episode, if the first scene isn't one of Jerry's opening stand-up, it will shown the regular actors and the creators, and, the main producers, script writers and directors during the second scene.
From this episode onwards, Wayne Knight will receive "With" crediting.
In a deleted scene for "The Engagement", a police officer gives Kramer a ticket during the dog heist. The same man (Gary Yates) plays the security guard in "The Maestro" (two episodes later).
In one Mad About You episode, Kramer appears, and Jerry appears in another (he was playing himself, so we can't now if he was the Jerry known by the show, or by his comedic performances in the clubs). But, in this episode, George & Susan said they wanted to watch Mad About You on TV.
Jerry asks George if Susan's skin has "a pinkish hue?" and George says yes.
George first mentioned he likes a pinkish hue in "The fix-up"
The man that Jerry is talking to as he's leaving the theatre after seeing Firestorm is Maroon Golf from the Puerto Rican Day Parade.
All of the episodes in the next three seasons will have a loose and connecting thread, very similar to Season Four. George's engagement with Susan is a recurring storyline, as well as Elaine's on and off relationship with Puddy.