TRIVIA: On the airport, while Aaron and Kyle are hugging, it's obvious that the actor playing Aaron isn't Cristian de la Fuente. The actor was unavailable, so they used an extra for that short scene. That's why his face isn't shown. The reason why Cristian De La Fuente couldn't appear in this (or most episodes) is becaused he went back to Chile (like Kyle always said) to make a chilean "Punk'd", named "Golpe Bajo" (low kick).
The Scene in Lina's apartment, when Duncan tells Richie that he's on the team, was originally planned to be filmed on the set of Duncan's house but due to it not being set up during the week of production, the writers decided to film it on the set for Lina's apartment.
During the scene in a grocery store's produce section, a sign for cantaloupe is misspelled "cantalope".
In the scene where Kat sneaks back into bed with Benjamin, there is a goof with her boot; he hands her the boot, saying that he knew she'd be back. Kat tosses it over the side of the bed, but when the camera angle changes, the boot is back, sitting on the covers in front of her. The camera angle changes again, and the boot is gone; it goes back to the second angle, and the boot reappears.
TRIVIA: Kyle tells Kat that his boyfriend is in Chile. The actor who played Aaron in previous episodes is Cristian de la Fuente, who is also Chilean.
TRIVIA: In this episode Kat is wearing the leather jacket she got when Ethan took it from his ex-fiancee, finally realizing that she's no good for him. Ethan bought the jacket himself for 700 dollars.
TRIVIA: In the end, when Lina comes to the store and Richie hugs her, she is wearing the same hat she wore in the first episode when they met, The Class Reunites.
TRIVIA: Lina is seen holding the trumpet Richie gave her in episode six, The Class Goes Trick or Treating.
TRIVIA: The car that Richie is driving is not the same one that was used in the first episode. This episode he drives a newer Ford Taurus. In the first episode, he was driving an older Mitsubishi Eclipse.
GOOF: In the end of the episode when Richie finally gets out of the car to meet Lina, you see Ethan attempting to put his arm around Kat's shoulders, after that, when the camera goes up you can clearly see that they are not in the same positions they were before. Ethan is now in the right and Kat in the center.
Richie tells Lina how magnesium added to water burns with a brilliant light. However, magnesium is inert in water; it will burn with a blinding light if set on fire. Potassium and sodium metals will burn if added to water.
It's revealed that Oprah's middle name is Liza. Probabbly after Liza Minelli.
TRIVIA: This is the first time, that we know of, that Lina has spoken to Nicole, since third grade.
GOOF: During the montage of the spreading of Holly's bunny killing, a news crawl at the bottom of a TV set misspelled "Philadelphia" as "Philidelphia."
GOOF: Richie shoots the nail gun. All nail guns have a safety switch which makes it impossible to fire a nail gun in mid-air. They need to be pressed up on a surface in order to operate.
GOOF: When Lina finally got the file out of the cabinet, in the first shot it is open, then the angle changes and it is closed.
GOOF: When Nicole's mobile phone (a Motorola RAZR) rings, the ringtone is actually the Nokia ringtone, not Motorola.
TRIVIA: Jason Ritter's character Ethan Haas shows significant change from the previous episode which takes place during the same night. His hair has grown tremendously from the first episode. This is mostly because the pilot was shot months before this episode.
TRIVIA: Kat notes that her sister Lina was born 6 minutes after her, which makes Lina the younger twin sister.
TRIVIA: First episode to feature the Previously On segment.