Lisa's last name is Turtle throughout the series, but in the last scene of this episode, Zack addresses her father as "Dr. Turtlelay."
When Slater tries to stop Mr. Belding from leaving his office during the clothing sale, Mr. Belding opens his office door but is then shown entering the hallway from the opposite end of the set.
It seems very unlikely that anyone would have tipped Lisa considering that she and the gang weren't allowing any of the customers to actually eat their food before clearing their tables.
Nitpick: When Lisa drops the tray, Max picks it up and says he velcroed the food to the tray. Everything is perfectly in place. Exactly how do you velcro burgers, fries, and drinks to a tray?
Zack: This looks like a job for, Zack-man.
Lisa: You think I went overboard?
Zack: Like the crew of the Titanic.
Zack: The moral of the story, gang. Well, it's simple; (Zack shows a credit card with the name Lisa on it) The Lisa Card, don't leave home WITH it.
Zack: Screech even sold his body to science.
Jessie: Yeah, they gave him twenty dollars to take it back.
Kid: Miss, this isn't what I ordered. You were supposed to toast my buns!
Lisa: You want toasted buns? Go sit on a microwave!
Lisa: I'm sorry, Max.
Max: That's okay. It's only the third tray you've dropped. Don't worry about it.
Zack: How's she doing? Let me put it another way. If Lisa were a car, she'd be recalled.
Zack: We only made $53 selling Lisa's clothes. So, she had to do the most humiliating, insulting, degrading thing possible for her; get a job.
Slater: I'm confused, sir. You know, maybe I'm just trying too hard to get girls to like me.
Mr. Belding: Hey, now I can identify with that. This may come as a surprise to you, but when I was your age, I wasn't... well, you know... the hunk I am now!
Slater: I can't believe this, sir! No, I thought you were Stud City!
Mr. Belding: Everybody thinks that!
Zack: ... Kelly got B's, and her parents got her ice cream... (looks at report card) I haven't figure out WHAT to buy my parents yet!
Don Barnhart becomes the show's pernament episode director.
This episode also aired primetime on a Monday night.
This is the only episode to my knowledge where the famously recurring twin girl extras have lines. This is also the first time they are acknowledged by a main cast member, Zack, who says "Now that's what I call a matching pair."
In this recurring role, Carol Lawrence is credited as both Mrs. Wentworth and Miss Wentworth on various episodes.
Zack: (Zack shows a credit card with the name Lisa on it) The Lisa Card, don't leave home WITH it!
This is a play on the slogan of the American Express Card: Don't leave home without it! And the logo on the Lisa card is similar to that of the Visa card the real-life credit card company.
Zack: This looks like a job for, Zack-man!
This is a play on Clark Kent's line from comic books and cartoons: This looks like a job for Superman!
Zack even tears open his shirt to reveal a Z on his chest the same way Clark Kent tears open his shirt to show Superman's S.
During the scene that Lisa imagines sharing with her father that she abused the credit card, her father says, "Tell your father, he knows best." This is an allusion to the TV series, Father Knows Best. It was in production between 1954 and 1960. It was in re-runs in the 1960s.
The title refers to/puns off of Visa Card, the real-life credit card company.