Four, Five, and Six are in the gym together. Five and Six are having a fun time using themselves as living stamps getting the ink with something called a "jump pad". Four is nervous of the jump pad, but Five, reasoning that Numberjacks need to jump, convinces him to give it a try. He does, but doesn't make a very good stamp. He's about to try again, when the alarm sounds.
They go to the control room, where it turns out that the problem is that a little girl's "four" number tile is distorted, and the four on two other girls' die is missing. Four is launched (after a doorbell ring) and lands on an address number.
However, the landing is a bit awkward, and then a woman has trouble delivering a package due to another address number (another four) being broken, so Four takes the number's place.
At a restaurant, a couple's table number is wonky, so Four takes its place. He then sees slime and realises that the Problem Blob is the one doing the damage. Just then, the Blob hits both the man and Four simultaneously. This causes Four to think he's the man and the man to run off with one arm sticking up and the other sticking sideways. Five suspects that they've swapped places.
Sure enough, the guy starts trying to be the table number, then when the couple is served, he runs away and leans against the door whose address number Four landed on. This causes the door to open and him to fall over, then he lies on a little boy's birthday cake.
Meanwhile, Four still thinks he's a human and Five tries to imagine Four living his whole life under the delusion that he's a human: he'd have trouble riding a bicycle, be a good student but have trouble playing sports, and would have to find work, so she imagines him as a doctor, racecar driver, or pop star.
Back in reality, another man has the "four" on his sports shirt missing, so "Numberjack Man" as Three has nicknamed him walks up to the sports guy. Then, a four on a woman's cell phone goes missing, so he walks up to her, creeping her out. The Numberjacks use brain gain to make "Numberjack Man" write four dots on the die and the shirt, four lines on the cake (that's been replaced), four lines again on the shirt, and finally the number four on the tile, the phone, and the shirt.
With everything written on, Four and "Numberjack Man" get swapped back, then the Problem Blob gets swapped with a lump of ice from the North Pole.
Four comes back, they recap the episode, and then he tries stamping himself again, this time properly. Three tries, but ends up hitting the paper sideways yet is still satisfied as she ends up with three dots. Six then asks the viewers to write him as dots, lines, or a number.
This episode provides examples of
- Accidental Pervert: "Numberjack Man" walks right up close to a woman and smiles at her, so she runs away looking disturbed. Actually, he wanted to replace the number on her cell phone.
- Birthday Episode: Downplayed. A sub-plot is a little boy having troubles on his birthday with his cake.
- Birthday Party Goes Wrong: Subverted. "Numberjack Man" lies on a little boy's birthday cake, squashing it, but then they get a new one.
- Ding-Dong-Ditch Distraction: Three rings the doorbell so Four can launch.
- Green Is Gross: The Problem Blob and his green slime cause Three and Six to look repulsed.Six: Not what you want to see at a restaurant.
- In-Series Nickname: The guy who takes Four's place is nicknamed Numberjack Man.
- Likes Older Women: Invoked. The Problem Blob causes Four to fall for a grown woman, thinking he's her boyfriend.
- Plenty of Blondes: The first three problem victims, plus the man's girlfriend, are all blonde.
- Snark Ball: Four, a usually polite four-year-old, says, "Oh, great" at one point.
