Kelly Bishop (Emily), Keiko Agena (Lane), Matt Czuchry (Logan) and Edward Herrmann (Richard) do not appear in this episode.

Lorelai: Jack Bauer should torture his suspects by making them go car shopping with their exes.

(Lorelai goes into Luke's and sits at the counter next to Kirk)
Lorelai: Hey.
Kirk: Well, well, well. I always suspected this day would come.
Lorelai: Hi, Kirk.
Kirk: You're not getting this seat back.
Lorelai: Huh?
Kirk: You can't. It's mine now. And frankly, I can see why you hogged it for so long.
Lorelai: What?
Kirk: It's clearly the best stool in the joint. It's close to the cash register and the kitchen, which guarantees plenty of face time with the boss. Climate wise, it's positioned between two air conditioning vents, which creates a nice cross ventilation, never --
Lorelai: Kirk, you can have the seat.

Sookie: Close your eyes.
Lorelai: Ooh fun!
Sookie: Now, I want you to imagine your dream car. It can be anything you want. You're backing out of the driveway. You're driving through Stars Hollow. "Good morning, Townspeople! Top of the morning to you."
Lorelai: Why am I saying "Top of the morning?"
Sookie: It doesn't matter what you say. It matters what you're in. Can you see what you're in?
Lorelai: I think I can see it!
Sookie: Okay, what kind of car is it?
Lorelai: It's not really a car, it's more of a float.
Sookie: A float?
Lorelai: In a shape of a swan. And I'm dressed all in white.

Lorelai: It's different. I don't get that feeling.
Luke: Oh, for God's sake.
Lorelai: What?
Luke: You're being ridiculous.
Lorelai: Why?
Luke: You don't buy a car based on a feeling.
Lorelai: No, you don't buy a car based on a feeling.
Luke: It's not just me. It's the whole rest of the population.
Lorelai: Really? You took a poll and you know how everyone else in the world buys their car?
Luke: I don't have to. I already know what they're going to say.
Lorelai: Well, I am the person buying the car so the only opinion that matters is mine.
Luke: Oh, that is so like you! I mean, this is bathroom tiles all over again!
Lorelai: I was right about the tile.
Luke: No, you weren't!
Lorelai: The tile was too big for the bathroom.
Luke: The tiles were not too big for a bathroom! You buy the amount of tiles based on their size that fit into the room you are tiling!
Lorelai: That's so narrow minded.
Luke: It's not narrow minded, okay! It's sane! Here's a news flash for you, okay. Sports cars don't think they're better than other cars! Okay? Hatchbacks do not have SUV inferiority complexes!
Lorelai: Heh. Now who's ridiculous.
Luke: Yeah, and sedans aren't afraid to get dirty!
Lorelai: You know what I think it is? You're hungry.
Luke: What?! No!
Lorelai: Sometimes you get like this when you're hungry.
Luke: I'm not!
Lorelai: (looks through her purse) I think I have some cookies in here. Some Oreos.
Luke: I'm not! Besides I wouldn't eat anything that came out of that bag!
Lorelai: They're in a wrapper. (pulls out a bag of cookies)
Luke: I can't believe you still haven't cleaned that thing out!
Lorelai: Please.
Luke: How much time do you lose a day looking in that thing? Five, ten minutes? Multiply that by a year I bet you gain a month if you just took an hour and cleaned it out. (Lorelai smiles) What?!
Lorelai: Nothing.
Luke: You're smiling.
Lorelai: What? No! You've got low blood sugar.
Luke: I do not have ... okay. Are you going to buy a car or not?
Lorelai: Not.
Luke: Okay. Can we get out of here then?
Lorelai: Gladly.
Luke: And we're not listening to any of the crap you put on the radio.
Lorelai: It's not crap.
Luke: Yeah, it's crap.
Lorelai: It's Air Supply. You know what you need? A milkshake.
Luke: Yeah, we're not stopping for a milkshake.
Lorelai: Alright, let's Rock-Paper-Scissors.
Luke: No, no, no.
Lorelai: So you forfeit?
Luke: No, I -- (opens the truck door for her and pushes her in)
Lorelai: If you don't play the game, you forefeit and that means a giant milkshake for you my friend.
Luke: (as Lorelai's talking) No, we're not stopping. We're not stopping. We're not stopping.

During the episode, Jackson lifts up Lorelai's doll house, drops it and breaks it. However, in "Twenty One is the Loneliest Number", Luke isn't able to lift the doll house without taking the top off of it first.

Midway through the episode, Jackson is at work and Sookie is at the Inn in the kitchen with Lorelai. Earlier Sookie mentioned that her kids have chicken pox, yet neither parent was at home caring for the kids at that moment.

Episode Title: It's Just Like Riding A Bike

In addition to referencing the popular saying as well as the obvious reference to Lorelai having to ride her bike after her Jeep dies, the episode also has similarities to a Murphy Brown episode also named "It's Just Like Riding a Bike". During the episode, Peter returns to town and he and Murphy restart their relationship.

Sookie: Couples have been breaking up and becoming friends. I mean look at Ryan O'Neal and Farrah Fawcett, huh?

Farrah Fawcett and Ryan O'Neal had an on-again, off-again relationship for several years and continued to maintain their friendship while they were not together.

Lorelai: Jack Bauer should torture his suspects by making them go car shopping with their exes.

Jack Bauer is a counter-terrorism agent on the FOX action series 24.

"It's Just Like Riding A Bike"

Not only does the episode title refer to the popular saying, it can also be applied to Luke and Lorelai's relationship. Though rough at first, the two eventually got their rhythm back after spending time together, similar to the saying the episode is named for.