Before Elaine is awakened by her neighbor's alarm, she has a dream where she's in bed with Jerry, George and Kramer. This scene is edited from the syndicated version.
Goof: When Elaine thinks it's her alarm clock buzzing, we see it's 3:30 but seconds later when she screams, the clock shows 3:29 !!!
Nitpick: Kramer estimates that the space under Elaine's neighbor's door is about half a millimeter. In actual fact, it's at least a full centimeter - 20 times as much as Kramer suggests.
Elaine and Kramer blew the electric circuit attached to her neighbor's apartment using a paperclip in the outlet in the hall. However, later in the episode, when they go back to feed the cat, they use Kramer's slicer. But because they'd blown the circuit, they technically shouldn't have anywhere to plug it in.
When they try to blow the circuit the light goes out in the hallway, so the power must have been out for the whole building. Obviously, the power was restored before they used the slicer in the hallway.
Elaine says that woman whose apartment smells like potatoes went out of town and left her alarm on. However, later, when Kramer pulls off Elaine's doorknob, he accidentally opens the neighbor's door across the hall. He exclaims "That's a lot of potatoes!" and then a man's voice screams back. Apparently, Elaine was mistaken about which apartment was responsible for the potato smell.
George says the "boom-box incident" occurred in 1989, back when he still had hair. But, the episode "Good News, Bad News" was from 1989 and George was STILL bald!
In 1989 George was bald, plus he was rather slim, Kruger states that George was a pear shaped loser then.
The door that Kramer slides the meat through for the cat looked like it was about 2 inches off the ground. In that case, it was pointless to bring the slicer. They could have just bought some regular lunch meat.
In the episode, the characters say Dr. "Sederedes", not Seredes, as it is shown on this page.
Jerry: Skin Cancer!
George: So I set up a screening, everyone takes their shirt off and click, I snap me a shot of a bare-chested Kruger.
Elaine: You have a little thing for this fella'?
Kramer: Moles -- Freckle's ugly cousin.
George: Saving lives? She's one step above working at the Clinique counter.
Jerry: Dermatologists. Skin doesn't need a doctor.
George: Of course not. Wash it, dry it, move on.
Elaine: How was the doctor date?
Jerry: It died on the table.
Kramer: I haven't had a decent sandwich in thirteen years.
George: This Kruger guy is clueless. I can't wait to work for him.
Kramer: I've cut slices so thin, I couldn't even see them.
Elaine: How'd you know you cut it?
Kramer: Well, I guess I just assumed.
George: You simply must apologize.
Jerry: Must I?
George: Yes! Because it is the mature, adult thing to do.
Jerry: How does that affect me?
Kramer: Why would I, a Juilliard-trained dermatologist, send [Kruger] to another doctor?
Kramer: And Jerry, we are gonna need a case of Kaiser Rolls.
Jerry: I think we might have some left in the stockroom.
(Later on in the episode)
Kramer: (Jerry) Oh yeah, I couldn't find that stockroom!
Dr. Seredes: Do you have any idea what it's like to save someone's life?
Jerry: Is it anything like hitting a homer in softball?!
Dr. Seredes: No.
Jerry: Cuz I hit a whopper last week!
Jerry: You call yourself life saver, I call you pimple popper MD!
Kramer: Yes, but where does the meat go?
When Elaine turns on the radio to drown-out the cat she dances using her 'little kicks' from the episode of the same name.
Other things reused from previous episodes:
At one point Jerry tosses a towel onto Kramer's face. In "The Red Dot," Mr. Lippman tossed the cashmere sweater onto George's face.
Kramer takes a picture of Mr. Kruger without his shirt. He also captured Elaine's nipple in "The Pick," and George in his underwear in "The Package."
Expecting imminent unemployment, George wonders about joining the Coast Guard. In "The Revenge," he considered a list of jobs for which he was obviously unqualified.
Elaine's neighbor's cat won't stop meowing. In "The Engagement," her neighbor's dog wouldn't stop barking.
Kramer takes seriously Jerry's sarcastic remark about having a stock room. In "The Pothole" he took seriously Jerry's sarcastic remark about having a shed out back.
Elaine tells Kramer that she's got to stop off the circus and Kramer mentions that he's afraid of clowns. In "The Gymnast" when Jerry and his girlfriend went to the circus, he tells Kramer that he's coming with him, then Kramer tells him that he doesn't want to go because he's afraid of clowns.
The role of Sara is played by Marcia Cross, who played Kimberly on Melrose Place. In episode #102 "The Beard" Jerry and Elaine talk about Kimberly when Jerry finally admits to watching Melrose Place.
When Kruger comes to the Festivus dinner at the end of "The Strike", he mentions Von Nostrand when he sees Kramer, who agrees silently.....
Jeff Holland notes that Kramer again uses the name of Von Nostrand again. He also used it in "The Nose Job" and "The Pilot (1)". Chris Peterson adds that Kramer also used the name again when trying to obtain Elaine's medical records in "The Package".
Viewer Kyle Westphal was the first to note that George says the incident took place in 1989 and Kruger said the picture was from 10 years ago. A difference of two years.