The show opens with a butt smashing contest, and Numbuh 4 who is a five time winner loses when he slips on his brother's diaper.
Meanwile a saftey freak builds saftey robots after seeing this contast, to make kids safer, but his plan soon backfires when the robots turn on all adults because they claim them to be a saftey hazard to kids, so with numbuhs 2 and 4, numbah's 4 brother Joey, safley breaks into the robots main base to shut them down for good.
This episode was different in the since that it only focused on two KND members 2 and 4, and those two together make a great comedic team.
I liked how numbuh 4 really cared for his brother at the end, even though it was just ketup, it shows that numbah 4 isn't that bad.
Not the best episode, but still really good, I like when it just focuses on two KND members, maybe they will do more in the future with other members.