- Kowalski's new gadget is made up of a vice clamp, 9volt battery, LED timer, an ostrich feather, a spork and blueberry bubblegum. He doesn't know what it does until Marlene tries it out, it cuts through rope.
- This is the first time Julien didn't make an appearance, as Maurice and Mort had a second disappearance.
- This is the second mention of Manfredi and Johnson. Manfriedi was the cute one until their "little Nairobi surprise party".
- Marlene's new roommate arrived on a "Class F" freighter.
- This is the first appearance of Rhonda the walrus.
- There is another sewer entrance right outside of Marlene's entrance to her cave.
- Marlene owns a gas mask.
- The penguins have a self destruct button for their habitat.
- Alice's office has a computer and a Mort calendar on the wall.
- Kowalski's invention turns out to be a plasma cutting saw.
- This is the second mention of Dr. Blowhole, Skippers nemesis.
- Running Gag: The penguins keep on getting inside Marlene's habitat without using the front door.
- Antagonist(s): Rhonda and Dr. Blowhole (mentioned)
Foul Ups, Bloops, and Blunders
Behind the Scenes
- Working Title: "Annoying House Guest"
- The beginning of the episode was cut in the UK, including the title card. It was until that point where the penguins realize they have an intruder.
- The Hoboken Aquarium is a real aquarium.
- It is included in Operation: DVD Premiere
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