The 3/4 channel, episode 3!

Operation B.U.T.T., Numbahs 2 through 5 see a black mail photo of Nigel when he was naked, and they start making cracks about his huge butt. Also, when Numbah 3 cries a lot about losing Numbah 1, he tries to comfort her by talking through her stuffed animals, but accidentally says the word 'Leaving', and he gets Numbah 3 even more upset.

Operation L.O.V.E., Wally gets jealous because Kuki was about to kiss the DCFDTL, and later realizes that it was just the school play. Kuki later is upset because she didn't get to sing her final number, but she gets happy when Numbah 4 agrees to sing the duet with her.

Operation S.N.O.W.-D.A.Y., Wally brags on about how he'll never be in love with any girl and how he will never even Like any kind of girl. Kuki gets mad at this and pushes him down, then walks away.

Operation Z.E.R.O. was the Kids Next Door movie premire, and there is a lot of hand holding, hugging, and maybe... just maybe.... a kiss or two from Wally and Kuki!!!

Operation C.A.T.S., Numbah 4 tears apart Numbah 3's stuffed animal, paying for it when he gets mistaken as a cat by the crazy cat lady. This is basically the only episode where he tells Kuki that he loves her.

Operation C.O.U.C.H., Numbahs 3 and 4 fight over the remote and it gets lost somewhere in the couch. So, they go down there to retrieve it.

Operation K.A.S.T.L.E., at the end when Numbah 2 says, "Wow, that King Sandy sure has a weird taste in girls." Taking this as an insult, Numbah 3 gets really mad and when the 'End transmission' screen comes on, you can hear Numbah 2 being slapped... 2 times. The he says "What'd you hit me for?" and then comes the voice of Numbah 4:"Nothin'." It appears that Numbah 4 has taken that to an insult also.