At the Chum Bucket, Plankton is introducing a new chum sauce, which melted through the pan and later through the floor. Just then, the alarm sounded, informing Plankton about a customer. Plankton went to receive the order, only to find that he wanted a Krusty Krab product, so Plankton told him to get those foods and beverages at the Krusty Krab. As he complained over how the people won't buy his food, he felt that Karen wasn't a good employee to him. Then, he threatens to replace his wife with much cooler machines, all three which failed to operate steadily. One of those machines was a toaster with arms and legs, which exploded, but survived. Another which is made of mostly liquid, but popped open and lost its liquid and also survived. The last being a windmill with a hairdryer on its back. Soon, the new inventions were acting aggressive toward each other. Plankton stated that he has had enough of Karen. Karen left a note saying that she's tired of being blamed for his failures. Later, Plankton sics his machines on the Krusty Krab, but it fails. He sees Karen, who has come back to get her things. He apologizes to her and she accepts his apology. They go back to the Chum Bucket together.
( ‣ ) Associated production music
( • ) Original music
( ◦ ) SpongeBob music
•SpongeBob Theme - Jeremy Wakefield, Sage Guyton [title card] ‣Wooden Bear - Gil Flat, Tony Tape, Florian Voelxen [opening] ‣Frankenstein's Niece A - Gregor F. Narholz [Plankton's chum melts through the floor] ‣Background Blues - Otto Sieben [customer at drive-thru] • ? - Jeremy Wakefield ["What is wrong with people?"] ‣ ? [Plankton threatens to replace Karen] ‣Romeo & Juliet Overture - Peter Ilyich Tchaikovsky, Fiachra Trench [Karen watching TV] ‣Star Premiere - Sammy Burdson, John Charles Fiddy [Plankton's first new invention revealed] ‣Wheels Within Weels - Ronald Hanmer ["That, my dear, is a T-119A Compumatic."] ‣Star Premiere - Sammy Burdson, John Charles Fiddy [second invention revealed] ‣Ticker Tape - Cecil Milner ["Next, behold!"] • ? - Jeremy Wakefield [invention breaks down] ‣Variety Link (d) - Dick Stephen Walter [third invention revealed] ‣Workers Playtime - Harry Bluestone ["Have you ever witnessed such marvelous machinery?"] •Vibe Sting - Nicolas Carr ["Oh, right."] •Comic Walk - Nicolas Carr ["Okay, here we go."] ‣Dramatic Cue (g) - Ronald Hanmer [inventions fighting] • ? - Jeremy Wakefield [Plankton flattened] ‣Drama Link (b) - Hubert Clifford ["It's you who's been holding me back!"] ‣Drama Link (c) - Hubert Clifford ["Maybe I could iron out a few bugs."] • ? - Nicolas Carr ["What's this?"] ‣Drama Link (o) - Hubert Clifford [Plankton reads Karen's note] ‣ ? ["Who needs her?"] ‣Wargames Linking Section (b) - Keith Mansfield ["Okay, team, listen up."] ‣Attack - Tony Hymas [Plankton combines the three inventions] •Bikini Bottom News Theme - Nicolas Carr [news on TV] •Steel Sting - Jeremy Wakefield [Squidward shuts it off] ‣King Kong Coming - Gregor F. Narholz [Plankton's machine approaching the Krusty Krab] ‣Wargames Linking Section (f) - Keith Mansfield ["Krabs, I want to see you."] ‣Guerilla Warfare - Harry Bluestone [Plankton demands the Krabby Patty formula] ‣ ? ["Are you getting this?"] ‣Guerilla Warfare - Harry Bluestone [Plankton goes back inside the machine] ‣Battle at Sea - Johnny Pearson ["Battle stations, men!"] • ? - Jeremy Wakefield [machine unplugged] ‣Hawaiian Cocktail - Richard Myhill [Plankton crying] ‣Kamakani B - Kapono Beamer ["Oh, I knew you couldn't stay away!"] • ? - Sage Guyton, Jeremy Wakefield [ending]
It is unknown how the liquid robot rebuilds itself.
This is one of few episodes where Plankton takes the role of a "protagonistic villain."
SpongeBob does not appear until the last 5 minutes of the episode, making him a minor character in this episode.
The Chum Bucket has a drive-thru in this episode.
When SpongeBob says "We're all doomed! We're all doomed! Doomed-de-doomed-de-doomed-de-doomed-de-doomed!" it could be a reference to the show Invader Zim, a Nicktoons show.
Running Gag: Plankton forgetting to blink.
The Bikini Bottom News said that Plankton's invention was attacking the city, yet he only walked across the street to the Krusty Krab and didn't go into the city at all.
This episode aired as part of the Bob Squad marathon.
Plankton's outfit is a reference to Adolf Hitler.
It is almost impossible that Karen and Plankton's wedding photo was in color.
The only ways this is possible is if they color enhanced it or they got a color photographer (which would have been really expensive because of it wasn't a common thing at the time of there wedding, which would have been at least 20 years from when this episode aired)
The letter from Karen says microorganism, but Plankton reads it as "single-cell organism."