The episode starts out when two customers park at the Chum Bucket. Plankton thinks they want to eat there, but they were parked there because they couldn't find parking at the Krusty Krab. Karen then suggests that Plankton should advertise his product. Plankton then hangs a sign that says CHUM IS METABOLIC FUEL! Patrick comes along and tries to read the sign, but his head starts smoking from the strain of trying to understand what these new words are. After his head is put out, Patrick then rearranges the letters so the sign reads CHUM IS FUM! The new slogan starts to attract customers. Plankton hires Patrick as his slogan manager. Meanwhile back at the Krusty Krab, Mr. Krabs believes Plankton has stolen the secret formula, and comes up with a plan to steal the formula back. Plankton sees through their disguise and they realize that it was the slogan that brought in the customers, despite the fact the chum tastes awful. (To combat the disgusting taste of the chum, the customers simply say Chum Is Fum over and over.) Then Plankton goes to Patrick to check on how his new assignment to come up with new slogan ideas is going. However, all Patrick does is write Chum is Fum in a thousand different ways. Plankton then gets mad at Patrick, but cools down because Patrick's slogan is still attracting customers. A few days later, people are getting bored of the slogan, so Plankton and Patrick hold a board meeting. Patrick comes up with a new slogan three days later, changing it to FUM IS CHUM. This brings back Plankton's customers, much to the chagrin of Mr. Krabs. Business is so large Plankton gets into the restaurant magazines and even a hockey team shows up to eat. Patrick then decides the resign from his position as advertising director because he is "burnt out." (There is literally a hole burned into the back of his head.) Plankton protests, but then bluffs to make Patrick believe that he is disposable, and not necessarily to keep customers eating at the Chum Bucket. During his rant, Plankton accidentally insults his customers over the intercom that he had installed by the cash register earlier to taunt Mr. Krabs. His customers hear him calling them "bufoons, morons, the dumbest of the dumb" among other things, which causes all his customers to abandon their chum in anger. Plankton then gets beaten up by the hockey team. At the end, everyone sees Patrick finishing a sign that says the Krusty Krab's new slogan, KRABBY PATTIES ARE FUM! and everyone returns to the Krusty Krab.
( ‣ ) Associated production music
( • ) Original music
( ◦ ) SpongeBob music
•Chum Bucket Rhumba - Sage Guyton, Jeremy Wakefield [title card] •Steel Licks - Jeremy Wakefield ["Customers? What customers?"] ‣Background Blues - Otto Sieben ["Hello, gentlemen, and welcome to the Chum Bucket!"] • ? - Nicolas Carr [line of customers at the Krusty Krab] ‣Drama Link (d) - Hubert Clifford [Plankton's angry] ‣Drama Link (f) - Hubert Clifford [Plankton tears up his menu] ‣Drama Link (o) - Hubert Clifford ["We're doomed, Karen. Doomed, I tell you!"] ‣Harp Ding - Nicolas Carr ["Advertising?"] •Steel Sting - Jeremy Wakefield [Karen sighs] • ? - Jeremy Wakefield [Chum Is Metabolic Fuel!] •Vibe Sting - Nicolas Carr [Patrick appears] ‣Cartoon Sting 1 - Gerhard Narholz [Patrick struggling to read the sign] • ? - Ron Wasserman [inside Patrick's brain] ‣Cartoon Sting 1 - Gerhard Narholz [Patrick's head on fire] ‣Steel Link (c) - Jeremy Wakefield [a few minutes later...] • ? - Nicolas Carr [a little longer than a few minutes later...] ‣Tympup B - Sammy Burdson, John Charles Fiddy [Chum Is Fum!] •Hawaiian Sting - Nicolas Carr [Chum Is Fum!] • ? - Jeremy Wakefield ["That's the dumbest thing I've ever heard!"] ‣Puffing Along - Harry Bluestone [sign attracts customers] • ? - Michael Bolger, Nicolas Carr [meanwhile at the Krusty Krab] ‣Danger HQ - Norman Dane [Krabs looks across the street] ‣Battle March Link (a) - Keith Mansfield ["SpongeBob, we have a situation."] ‣Chasey Racy - Norman Dane [situation alert] ‣Tough Mission - David Farnon [Krabs thinks Plankton stole the formula] ‣Tricks and Traps - James McConnel [SpongeBob and Krabs in disguise] ‣Wooden Bear - Gil Flat, Tony Tape, Florian Voelxen ["I'm full, thanks."] •Drama Sting - Sage Guyton, Jeremy Wakefield [explosion] ‣Puffing Along - Harry Bluestone [customers eating chum and puking] ‣Steel Licks (c) - Jeremy Wakefield [Plankton laughs] ‣Dachshund Walk - John Fox, Mac Prindy ["What brilliant slogans have you come up with this week, Patrick?"] • ? - Nicolas Carr [sting at end of scene] ‣Steel Licks (b) - Jeremy Wakefield [Krabs cries] ‣Cartoon Sting 4 - Gerhard Narholz ["You don't need help when you got a catchy slogan like mine."] •Comic Walk - Nicolas Carr [board meeting] • ? - Nicolas Carr [three days later] ‣Puffing Along - Harry Bluestone [Fum Is Chum] ‣Vibe Sting - Dick de Benedictis ["Nothing can stop me now!"] ‣Circus Overture - Daniel Janin [montage of Plankton's success] ‣On the Beach - Kapono Beamer [Patrick resigns] ‣Hawaiian Sting 5 and 3 - Sage Guyton, Jeremy Wakefield [Plankton gets beat up/ending]
Oddly, Karen wears a hairnet even though she doesn't have any hair.
This is one of the few times where The Chum Bucket starts to attract customers and Mr. Krabs and SpongeBob try to steal them back. The other times where in "Greasy Buffoons" and "Plankton's Regular."
The "3 Days Later" time card looks just like the Driven to Tears title card.
When Mr. Krabs looks out from his office there are only two customers. But when he says they have a situation to SpongeBob, there are no customers at the tables.
Frank has a red shirt when he approaches the counter after the Chum Bucket has a new slogan. The next shot when it zooms to the register, his shirt is blue.
When the hockey players first heard Plankton talking about his customers in a bad way, there were five of them. However, when they were about to attack Plankton with their hockey sticks, there were only four of them.
When Patrick was first seen putting up the sign for the Krusty Krab, the hole in the back of his head wasn't seen. When Patrick was seen for the last time, the hole is now on at the back of his head.
When Plankton was stomping on the ripped paper in anger, his head was still messed up. However, in the next shot when Plankton was yelling on how he's tired of the Krusty Krab stealing his customers, his head was suddenly fixed.
At the end of the episode, when Patrick finishes the point in the exclamation mark in "KRABBY PATTIES ARE FUM!" the ladder he is stepping on is shorter and he is below the sign, but in the next scene, automatically the ladder is longer and he is next to the sign.
When Plankton was going through the Box of Letters, the front door to the Chum Bucket was missing.
The path to the Chum Bucket seems longer than usual in this episode.