Codename: Kids Next Door Season 1 Episode 2

In "Operation: I.-S.C.R.E.A.M. (Important - Secure Creamy Refrigerated Edibles Avoid Meltdown)", the KND catch wind of some ice cream men who refuse to give ice cream to kids, so they interrogate them and get the password to their ice cream factory, only to be in for a major surprise from their arch-nemeses, the Delightful Children From Down the Lane. In "Operation: C.A.N.N.O.N. (Cannon And Naptime Not Occurring Normally)", Numbuh 1 leaves with his parents for a day, leaving the other KND behind.