Blythe has just received notification of acceptance into the summer program of Fashion University North, the top-ranked fashion design school in the country and has let both Mrs. Twombly and the pets know. At first, they're delighted to hear her moving up in life but become disappointed when she has to leave The Littlest Pet Shop, potentially forever when Blythe mentions doing fashion design as a career. When Blythe leaves, the pets go into a musical number in an Imagine Spot recording studio, "Stay Here Forever," expressing their concerns about not having Blythe around anymore.
Blythe excitedly shows off Fashion University North to her father through the website. While Roger is totally supportive of Blythe's ambitions, he displays great anxiety over her being gone. When Blythe goes to her room, Mrs. Twombly stops by to visit Roger to try to come up with ways to keep Blythe around over the summer. Roger takes slight offense to her suggestions and convinces her to let Blythe spend her summer at Fashion University North. Russell, peeking from around a corner, overhears this conversation and relays the information back to the other pets.
In Blythe's room, Blythe excitedly tells the news to her friends. She lets them know that Fashion University North is actually some distance away, meaning she won't be able to visit them at all. Jasper takes it the hardest.
Russell informs the other pets that Blythe will return in the fall. Sunil and Minka don't really know how long that will be as Minka uses a calendar as a snack, though Vinnie does know it will be for months. As the pets worry themselves to pieces, Russell points out that Roger and Twombly support Blythe's decision to leave and proposes they make going-away presents. The other pets say it's a good idea.
The last day of school has just ended, and Jasper, Youngmee, and Sue immediately start thinking about Blythe. Jasper reveals that he bought four tickets for the grand re-opening of Zany Island in hopes of convincing Blythe to stay. Blythe still intends to go to Fashion University North, but Jasper, Sue, and Youngmee will still attend Zany Island without her.
In one of her visits to The Littlest Pet Shop, Blythe apologizes to Zoe about not having the time to design more outfits for her. Zoe tells Blythe not to worry, and the other pets join in, especially Vinnie. When Blythe leaves the room, Russell gathers up ideas of how they're going to give Blythe a surprise. Each of them showcases their talents except for Russell, who realizes he has to do something too.
In Blythe's absence, Mrs. Twombly has hired a stand-in, Madison, a ditz and a hypochondriac, to take care of the pets, though in truth Mrs. Twombly just asked the first person she saw when peering outside. When Blythe finds out, she tests Madison if she can also talk to the pets, but she can't. Blythe retreats to her room and Russell continues to decide what the present should be, again reminded that he hasn't come up with something himself.
As Roger loads the car in preparations for the trip, the pets all perform one after another, plus Minka showing the painting she made depicting Blythe around all of the other pets. Russell apologizes to Blythe about not providing her a gift, but Zoe and Pepper point out that Russell contributed by setting up the show to begin with.
Traveling out, Mrs. Twombly informs Blythe that she's set up a webcam in the day care room so Blythe can always stay up to speed with the pets as Madison goes in to start her job. Blythe chats with her friends one last time before she heads into Roger's car. At the airport, Blythe says farewell to Roger, who's barely holding back his tears, as she dashes off to board the shuttle taking her to Fashion University North.
This episode contains examples of (YMMV entries go here):
- Bittersweet Ending: The episode ends as Blythe leaves Downtown City for Fashion Camp.
- Bland-Name Product: Zany Island is most likely Downtown City's analogue to Coney Island.
- Book-Ends: This season begins with Blythe traveling to Downtown City and ends with her going away.
- Borrowed Catchphrase: The bird in the very last shot utters a "What the huh?" when he realizes Blythe can speak to him. The pets also collectively say, "What the what?" when they hear Blythe will be gone all summer.
- Chekhov's Gunman: The Biskit Twins appear to make fun of Blythe for a few seconds, then walk off with no significance to this episode's plot whatsoever.
- Call-Back: Roger had a habit of needing Blythe to explain her acronyms to him. For the first time in the series, Roger knows what Blythe means (althought she simply spelled out "B-L-A-S-T"). It's the same as ever with Mrs. Twombly, however.
- The pets showcasing their talents, and Russell jotting down everything he sees, parallels the similar preparation scene for the fashion show in "Blythe's Big Adventure Part 2" almost one-for-one.
- Cliffhanger: The events are continued in the Season 2 premiere.
- Continuity Cavalcade: This episode has the single largest amount of references to previous episodes by a long shot, particularly the sendoff performances, as seen directly below.
- Continuity Nod: Pepper tells Vinnie to keep his tail on. It got detached from his body in "Frenemies."
- Also from "Blythe's Big Adventure Part 2," we see Penny performing ribbon twirling only to trip and get wrapped up in them like a mummy. Twice. Penny also performs for Blythe in Act 3 in the outfit Blythe made for her in that episode.
- When Blythe asks Russell to test if Madison can speak to them, Russell asks back if she was in a dumbwaiter accident too.
- Pepper once again has to stop Vinnie from yelling like an idiot. Her slapping Vinnie is also similar to how Sue hit Jasper whenever he uttered anything insensitive in "Topped with Buttercream."
- Vinnie denies being emotional over something, just as he did with Shahrukh in "Lights, Camera, Mongoose!"
- Pepper uses her Groucho Marx mustache from "Trading Places" and the gag arrow from "Russell Up Some Fun" in her sendoff performance.
- Vinnie uses the same outfit for the sendoff as he did for the People Pampering Pets Charity Ball.
- Cute, but Cacophonic: Blythe, Sue, and Youngmee are all revealed that they're able to scream loud enough to shatter glass in this episode.
- Don't Explain the Joke: Sue interrupts Jasper to stop him from explaining his pun during the webcam conversation. Jasper doesn't get the hint as he continues to explain his jokes later on.
- Early Installment Weirdness: This is the only season finale that doesn't end a two-parter.
- The Eleven O'Clock Number: "It Won't Be Long," a sendoff for Blythe leaving over the summer.
- Friend or Idol Decision: Blythe has to decide whether or not to attend Fashion Camp which is upstate, meaning she won't be able to see the pets all summer. Willingly, she goes with it.
- Four Lines, All Waiting: The four stories are closely related though: Blythe prepares to go away for the summer, Mrs. Twombly finds a substitute caretaker for Blythe's absence, the pets organize a farewell party for Blythe, and Blythe's friends at school are torn up over going to Zany Island without her. Roger gets a micro-story of his own too, though not much becomes of it. See "Next-Season Hook" below.
- Fun with Acronyms: Fashion University North.
- Glass-Shattering Sound: This happens three times in this episode, when someone squeals excitedly. Blythe's squeal in the Cold Open breaks Mrs. Twombly's glasses. Blythe squeals again and destroys a coffee carafe in Roger's kitchen. Later, Sue and Youngmee's squealing in obtaining Zany Island passes shatters a nearby streetlamp top.
- Hypochondria: Madison's defining personality trait. She uses hand sanitizer after shaking hands with Blythe, puts on an oxygen mask when entering the pet day care room, and is frightened when a chew toy squeaks.
- Multi-Part Episode: With "Missing Blythe."
- Next-Season Hook: By the end of the episode, the main plotline of Blythe going to Fashion University North has just gotten started, with her boarding the shuttle there. In addition, the B-story about Madison has only established itself, and Blythe's friends have not yet gone to Zany Island. The only story to receive closure of any sort is the pets' sendoff to Blythe. Perhaps it is no coincidence that it aired in close chronological proximity to another Hub show that didn't reveal itself to be a sequel hook until the end
- Ocular Gushers: Sunil bursts into tears towards the end of "Stay Here Forever." Vinnie mentions they installed a drain on the floor specifically for this.
- Running Gag: In addition to squeals of delight breaking glass, Vinnie repeatedly says something annoying prompting Pepper to smack him with a rubber chicken.
- Season Finale
- Shoo Out the Clowns: This entire episode is a lot more dramatic and less comedic than the episodes before it, and the third act is this compared to the first two acts.
- Shout-Out: This episode's title is taken from the song of the same name by Eddie Cochran.
- Squee!: Blythe's reaction to her acceptance into Fashion University North and Sue and Youngmee's reaction to obtaining Zany Island passes.
- Suspiciously Specific Denial: In one scene, Vinnie won't stop angrily yelling to Blythe about how he won't miss her and how the pets aren't planning any surprises. He's only stopped when Pepper clobbers him upside the head.
- To Be Continued: Averted. This episode does not have one, though the following episode, "Missing Blythe," begins with a Previously On sequence.
- Vocal Dissonance: The tiny blue bird at the end of the episode talks in a deep, gruff voice and is a Deadpan Snarker.
- Walk This Way: Minka interprets Blythe's hopping around the room in excitement as a game, causing the other pets to trace the exact same path Blythe takes.
- Where the Hell Is Springfield?: As this episode concerns another setting, geography becomes more important here than before. However, the writing keeps both Downtown City's and Fashion University North's locations ambiguous. The only clues given are that it's 'upstate' and that to Roger, it's "either a short flight or a long drive." Though they mention 'state' it is still dubious as to its location in North America, as Canadian borders such as those in Toronto are connected to several key 'states'. Being that this is a Canadian/American show, there may have been an intentional decision to place Downtown City as a close hybrid.