Chase continually pronounces Collin's name as "Colon," a running gag throughout the episode.
Chase's roommate, Collin, is voiced by Ben Diskin, who also voices Numbuh 1 in Codename: Kids Next Door.
The TV show "Girly Cow" was also mentioned in the iCarly episode "iAm Your Biggest Fan."
In reality, English accents sound nothing like how Collin talks.
The title represents the fact that Chase and Zoey literally traded places because Zoey came back to PCA and Chase went to Covington.
Zoey's room number at Covington was 127.
Chase's screen name is Froboy21. This is a reference to Chase having an afro.
When Lola is watching "Girly Cow" on TV, their TV is in the form of an apple that has been cut open to reveal the screen in the "core."
In "Goodbye Zoey?" Zoey gives Lola her room key before she leaves. In this episode, she is wearing it when she comes back.
Chase's roommate's name is Collin.
After three seasons, Zoey finally finds out Chase has been in love with her ever since her first day at PCA.
In the "Previously On..." section at the beginning of the episode (Canada only, in the US it is an hour long movie, not two separate episodes), there is a scene where Zoey is in a plane that did not actually air in the first part.
Chase gets a new friend, Gretchen, that looks like Zoey. However, she turns out to be totally unlike her.
When Zoey, Lola, and Quinn are in the dorm, they mention that it's 3:15 PM. Then Quinn says that she wants to get dinner. That time of afternoon is much earlier than when most people eat dinner.
The website Stacey mentions, www.specialtyswabs.com, redirects to iCarly.com.
Right before Chase came to ask Lola and Quinn what Zoey's new number was, they were flipping through the channels on the TV. If you look, you can see the Daka Shoe Commercial from the Drake and Josh episode, "Really Big Shrimp."
At the beginning of this episode when Mark and Michael were watching TV, he mentions that he was watching the Great Doheny, who was the magician on Drake and Josh.
Quinn says that if an atom loses a proton, it becomes negative. That's not true; if an atom loses a proton it becomes a new atom.
After the twenty minute break, it shows Michael and Lisa next to each other, but then it flips away. In the next shot, there is a guy with a yellow shirt in between them.
Logan's cast is suddenly gone after they discover he is OK.