When the Numberblocks' Numberlings fall off, the Numberblocks have to work out who they are and how numbers work.
This episode teaches about identifying numbers and digits with numbers greater than Ten.
The episode starts with Eleven bouncing her football on her head. Fourteen soon asks to do the same thing as she did, except with two Sevens instead. Inspired, Eleven decides to start a contest to see who can pass the football to their partner on their heads for the longest amount of time. Fourteen picks Twelve; since Eleven is the referee, Thirteen is without a partner. Fifteen comes out of the wall to help him. Unfortunately, she says his name, which causes him to split into Ten and Three, causing a chain reaction of knocking over Twelve, as the ball soon knocks off 11-15's Numberlings.
Everyone, albeit fine, no longer knows who they are. With a bunch of ones, nobody knows if they should even have one, only knowing that they are greater than One. Twelve gets the idea of rearranging them neatly in rows, followed by Fifteen arranging them while counting to five. Remembering something, Fifteen immediately splits into her Step Squad. Each Numberblock in the Step Squad proceeds to give each Numberblock their one's place digit, such as One giving Eleven a one numberling, because it corresponds to her one block.
Now with that taken care of, the Numberblocks notice there are still plenty of ones Numberlings leftover, enough for one for each of them. They can't remember what all the ones are for. Ten lands from the sky, demonstrating and reminding the others what ten is. They soon remember something- they need two Numberlings on their own heads. The remaining ones represent their singular ten block, and the other Numberling stands for the rest of their blocks. everyone proceeds to put their Numberlings back on their head, remembering who they are and nearly getting hit by the football in the process when Thirteen says his name, and nearly splits again when he says his name once more. With everything taken care of, all Numberblocks present proceed to continue the contest.
- Numberblocks 6, 8 and 9 are absent from this episode.
- This episode marks the second time the Numberblocks don't have their Numberlings on their head. The first time was at the start of One.
- As seen in this episode, the Numberblocks will have amnesia without their Numberlings.
- This could in fact link to the first episode, where One doesn't know who she is until her numberling shows up.
- An instrumental of Ten Again can be heard when Ten appears.
- This marks the first time someone says “Thirteen” and Thirteen does not fully split into Ten and Three. He was, but Fourteen stopped it in time.
- It is unknown on who to blame for losing their Numberlings. However, with logic and reasoning, it could be 15's fault for starting this in the whole place; 13 tries to prevent 15 from saying his name but regardless she says it. This causes a pandemonium.