When Plankton, Karen, and SpongeBob throw a party, SpongeBob gets tricked into putting his face on a copy machine. Plankton puts the copier on "Scan" and it scans SpongeBob. He clicks print and makes a SpongeBob clone the next day and then he colors the tie blue with a marker.
Then the next day, at the Krusty Krab, the copy walks over to the real SpongeBob and they work for Mr. Krabs. Squidward goes crazy because he thinks he's dreaming, causing him to beat up customers and Krabs.
Plankton makes 305 more clones to ask for the formula but then after they find out what the formula is twice, one of them turns into a light gray hue. SpongeBob finds out that one of his copies was made to steal the formula also. The copy then rolls up into the shape of a burrito and then vanishes in mid-air. As SpongeBob cries for his loss of his friends and Plankton asks the other copies about the formula, the other clones quickly vanish as well. Mr. Krabs comes with the paychecks for the copies, and the final clone disappears. When Plankton comes out to find another SpongeBob, he asks for the formula before he disappears, but it was the real SpongeBob. SpongeBob is still sad for the loss, but Plankton says that the citizens are better with one SpongeBob. Squidward comes back and then squishes Plankton after trying to fly and Plankton says "Right on my keys" and then the episode ends.
This is the first episode to have a title card with the title being repeated more than twice.
This is the second time Plankton asks SpongeBob to step on him. The first time was in "One Coarse Meal."
The SpongeBob copy that disappears when SpongeBob hugs him and yells "No! Don't disappear!" is most likely Me Three, as he faded after Me Two, but before all the other copies.
This episode confirms Plankton currently has no children.
This episode might take place before "Married to Money" because in that episode, Mr. Krabs claims he never told anyone the secret formula, and in this episode he had no problem telling the SpongeCopies the secret formula.
This is the second time Patrick gets shredded by a lawnmower. The first time was in "Born to Be Wild."
It is unaware how Karen is still alive, because in the movie The SpongeBob Movie: Sponge Out of Water, Karen dies because she used up her power to charge the time machine. It could be that the movie isn't in continuity with the series which could explain why Karen is still alive.