One night, SpongeBob and Gary watch a scary movie called Night of the Robot, which is about robots that take over the world. Gary tells SpongeBob that he shouldn't watch it as scary movies freak him out, but SpongeBob denies this. He is then shown laying in bed shaking in fear, wondering if everyone he knows is a robot. After asking Gary if he is a robot, SpongeBob decides he has nothing to worry about and tries to get some sleep. Unfortunately, he has a nightmare about a robot chasing him, and the next day at the Krusty Krab he has become very paranoid and believes that robots are "everywhere" (one turning out to be a trolley with cleaning equipment and a sack of sea potatoes, and another a red light which was actually the warning light for the deep fryer).
Meanwhile, Mr. Krabs is in his office listening to Bikini Bottom's number one hit song on his radio, titled "Electric Zoo". Mr. Krabs likes the song and hums to it. SpongeBob later walks past Mr. Krab's office and overhears him saying he feels "completely recharged". He then witnesses Mr. Krabs talking to his radio (he wanted it to play the song again), talking in a "robot" language over the phone (he called the radio station to ask if they could play the song again and was arguing with the DJ over the tune of the song), and doing a bizarre robot-like dance to the song.
This convinces SpongeBob that Mr. Krabs is a robot imposter, and he relays this information to Squidward. Squidward does not believe him, so SpongeBob tries several tests to prove that Mr. Krabs is a robot. First, he tests Mr. Krabs sense of humor by having Squidward tell a joke, but Mr. Krabs does not laugh. SpongeBob says that this is because he is a robot as robots do not laugh, but Squidward says that he probably heard it before.
SpongeBob then tests Mr. Krabs emotions by telling him that Squidward's father never hugged him to see if he will cry. Mr. Krabs says that although it is a little sad, Squidward can hug himself during his break. This further worries SpongeBob, but Squidward says that this is ridiculous and that his father loved him very much. This reminds SpongeBob of the third and final test: the love test. SpongeBob tells Mr. Krabs that Squidward loves him, but he simply says "Get back to work, Mr. Squidward".
Back in his office, Mr. Krabs's radio breaks and he decides to give the batteries to Pearl for her Christmas present. He then grabs a pair of tongs and removes a hard-boiled egg from a pot of boiling water, intending to eat it. But when Mr. Krabs goes to put some salt on it, he is startled when SpongeBob calls out his name and accidentally throws salt into his eyes.
Squidward then asks SpongeBob what the robots in the movie looked like. SpongeBob says that they had red eyes, metal pinchers for hands, and ran on batteries. Squidward then asks if Mr. Krabs looks anything like that, and this is answered when Mr. Krabs barges out of his office screaming in pain with glowing red eyes, the tongs he used to hold the egg, and the radio batteries in his pocket. As Mr. Krabs runs to the bathroom, Squidward finally believes SpongeBob and tells him to call the Navy, but due to their automated phone service, SpongeBob thinks that the robots have taken over the Navy. Squidward then announces over the microphone that robots are taking over the world, causing all the customers to flee the Krusty Krab.
Mr. Krabs then emerges from the bathroom relieved that his eyes aren't hurting anymore and goes back to his office (for some reason, he does not notice that the Krusty Krab is now empty). Squidward then wonders how they will find out what happened to the "real" Mr. Krabs, and SpongeBob says that the main character in the movie teamed up with a buddy and they got poop or collected information from the robot. After reading a book on how to torture, the two go into Mr. Krabs's office and tie him up, demanding to know where the "real" Mr. Krabs is.
After getting no answers and Mr. Krabs insisting that he is the real Mr. Krabs, SpongeBob and Squidward decide to interrogate his machines, which include a blender, a toaster, a food processor, and a coffee maker.
These, of course, do not give any answers either, so Squidward destroys them with a baseball bat. This greatly upsets Mr. Krabs as he paid good money for them, and he finally breaks down when SpongeBob brings in his cash register. He also mentions laughing with it and loving it, revealing that he is not a robot. Squidward asks how the movie ended- SpongeBob, while thinking the ending was great, remembers that the ending revealed the robot invasion was just in the characters' imagination and that there were no robots after all.
Realizing his mistake, SpongeBob declares it's time to feed Gary and runs off, leaving Squidward to take the heat from Mr. Krabs. As a nervous Squidward grabs a broom and begins sweeping, a very angry Mr. Krabs growls and screams at the top of his lungs "SQUIDWARD!"
After SpongeBob and Squidward evacuated the customers, Mr. Krabs comes out of the bathroom and goes back into his office.
He does not seem angry or surprised that there is no one in the Krusty Krab as in most episodes, he gets angry or upset if he finds out there are no customers in the restaurant. This could be because he was so relieved of his eyes not hurting anymore that he didn't notice.
In that episode, Mr. Krabs was accused of being a robot by everyone in Bikini Bottom whereas, in this episode, he was accused of being a robot by SpongeBob and Squidward.
When Squidward takes a hammer and a saw out of a shed, one can see a Krusty Krab calendar and it says that it was in September.
The song's name "Electric Zoo" is a possible reference to the Black Sabbath's "Electric Funeral."
If one looks closely when the Krusty Krab is zoomed out shaking while SpongeBob and Squidward are terrorizing Mr. Krabs, you can see the customers on the front inside, and the picture is similar to the scene where all the customers are running out of the Krusty Krab.
Interestingly, in "Imitation Krabs," SpongeBob thinks a robot is Mr. Krabs.
In this episode, it is the other way around: SpongeBob thinks Mr. Krabs is a robot.
His suspicions lead to him and Squidward accusing Mr. Krabs of being a robot.
In other countries, Squidward's joke is changed, most likely due to the fact that many countries do not use the "R" rating in movies:
In the Korean translation, Squidward's joke was "Why did the idiot die?," and the answer was "Because he forgot how to breathe."
In the German translation, Squidward's joke was, "Why Chinese don't like pirate movies?" And the answer was, "Because they can't say Arr!"
In the Brazilian translation, Squidward's joke was "Why the pirate only watched half of the movie?" and the answer was "Because he was wearing an eye patch."
In the Polish translation, Squidward's joke was "What's the name of Santa Claus' wife?" and the answer was "Renifer Lopez." ("renifer" means "reindeer")
In Indonesia, the answer of the joke is "Because they haven't got report cards yet."
In Latin America, the answer to the joke is "Because it was forbidden for cabin boys."
When Squidward and SpongeBob barge into Mr. Krabs' office, they beat up Mr. Krabs. When they are beating him up, it shows a picture of the Krusty Krab. If one looks closely at that picture of the Krusty Krab, there is a fish at the door.
When shown on October 24 (unknown year) at 7:00 pm, on YTV, the episode starts at the Krusty Krab.
The man the robot was chasing in the movie was Dan Povenmire, known most widely for being one of two creators of Disney animated TV series Phineas and Ferb, along with Jeff "Swampy" Marsh.
Before that, he was a storyboard director, writer, and assistant storyboard artist for a few episodes of SpongeBob SquarePants.
KRUM, the radio station Mr. Krabs listens to, is the name of a real radio station.
The tests that SpongeBob and Squidward use to determine if Mr. Krabs is a robot could be a reference to the Voight-Kampf test used in the 1968 science fiction novel Do Androids Dream of Electric Sheep? by Philip K. Dick and the 1982 film adaptation, Blade Runner.
After Squidward tells his joke and Mr. Krabs doesn't laugh at it, Spongebob tells Squidward that it was because Mr. Krabs is a robot, but however, Spongebob didn't laugh at the joke ether, so this was poor support on the fact that Mr. Krabs was a robot.
When Mr. Krabs has salt in his eyes, one is bigger than the other is but in the close up it is the same size.
When SpongeBob yells "I SURRENDER!" the Krabby Patties are gone. But when SpongeBob's hat flies through Squidward's nose, the Krabby Patties are back.
A "Help Wanted" sign is in the right window the first time the Krusty Krab appears in this episode and when Mr. Krabs is screaming at the end of the episode, despite the fact that there are already employees working at the place.
When SpongeBob calls for Mr. Krabs the fourth time and Mr. Krabs spills the salt in his eyes, the supposedly "hard-boiled" egg breaks and splatters like a raw egg.
When Squidward slaps Mr. Krabs and says "We can do this all night if you want." a part of the chair is missing behind Mr. Krabs.
The salt, when it flies into Mr. Krabs' eyes, was near the top of his eyes.
As he bursts through the door, the salt has collected into small piles at the bottom of his eyes, and eyelids.
Time Warner Cable incorrectly lists this as "Krab-Borg!"
Mr. Krabs only put one battery in his pocket, but when he comes out the door, there are two in his pocket.
When Mr. Krabs "pleads" with his radio to play "Electric Zoo" again, there is no sound (ie. another song or the DJ's voice) coming from the radio, despite the fact that the volume on the radio would need to be on in order for Mr. Krabs to hear the song.
It is unknown why the DJ and/or Mr. Krabs did not just say the name of the song instead of beeping because the DJ said that the song was "Electric Zoo" right before the song was played.
In the beginning, there was no cash register, but when Mr. Krabs goes to the bathroom, the cash register is back.
When Mr. Krabs is leaving his office because of his burning eyes, Squidward and SpongeBob notice that Mr. Krabs has batteries in his back pocket, but Mr. Krabs is far away from them.
Even though SpongeBob was equally guilty of capturing and detaining Mr. Krabs, the latter only yells at Squidward, though it was likely that because SpongeBob ran off, Mr. Krabs was unable to yell at him or Mr. Krabs was angrier with Squidward because he was the one who smashed all the expensive items belonging to Mr. Krabs.
Even though Mr. Krabs is a saltwater animal, his eyes are still burned by salt.